In re 2018 Grand Jury of Dallas County v. John Doe ( 2020 )


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  •                 IN THE SUPREME COURT OF IOWA
    No. 18–1534
    Filed February 14, 2020
    IN RE 2018 GRAND JURY OF DALLAS COUNTY
    JOHN DOE,
    Appellant.
    Appeal from the Iowa District Court for Dallas County, Dustria
    Relph, Judge.
    On interlocutory appeal, John Doe challenges several district court
    rulings in a grand jury proceeding regarding the ability of the State to
    subpoena a criminal defense expert and whether such contact merits
    recusal, the authority of the district court to quash a grand jury
    proceeding, and when fair-cross-section challenges to the grand jury panel
    must be raised.     AFFIRMED IN PART, REVERSED IN PART, AND
    REMANDED WITH DIRECTIONS.
    Alfredo Parrish and Tammy Westhoff Gentry of Parrish Kruidenier
    Dunn Boles Gribble Gentry Brown & Bergmann, L.L.P., Des Moines, for
    appellant.
    Thomas J. Miller, Attorney General, Zachary Miller and Denise
    Timmins, Assistant Attorneys General, and Matthew Schultz, County
    Attorney, for appellee.
    2
    APPEL, Justice.
    In this case, a prosecutor contacted an expert witness retained by a
    defendant facing the prospect of criminal charges, asking the expert her
    opinions about the matter. The expert declined to confirm whether she
    had been retained or to otherwise substantively respond, despite the
    prosecution advising her that she would be subpoenaed to appear before
    a grand jury investigating the potential crime.
    The defendant claims that the State may not lawfully subpoena a
    retained expert; that the prosecution’s contact with the expert was
    improper and requires disqualification of the State’s counsel; and that as
    a result of the improper actions of the State, the grand jury proceeding
    should be quashed. Additionally, the defendant questions the application
    of State v. Plain challenges to a grand jury proceeding. See 
    898 N.W.2d 801
    (Iowa 2017).
    For the reasons expressed below, we conclude that the State cannot
    subpoena an expert retained by the defense to testify before the grand jury
    regarding her opinions on the criminal matter being investigated. While
    we conclude that the ex parte contact was improper, we do not believe it
    is a basis to disqualify counsel. Finally, although we afford the defendant
    with some relief, we find no basis to quash the grand jury proceeding. We
    also address procedural matters regarding the proper development of
    claims under Plain as they relate to grand jury proceedings.
    I. Factual and Procedural Background.
    A. Initial Criminal Proceedings. John Doe is the father of S.C., a
    child. In November of 2017, law enforcement received information from
    the Iowa Department of Human Services that S.C. had possibly been
    physically abused. A detective investigated the matter by going to S.C.’s
    daycare center. There, the detective saw multiple bruises on S.C.’s back.
    3
    The detective took photographs of the child’s back and interviewed Doe
    about the bruises. Following the interview, a criminal complaint was filed
    against Doe alleging child endangerment causing bodily injury, which is a
    class “D” felony.
    Shortly after the complaint was filed, a county prosecutor was
    specially assigned to the case. Doe retained legal counsel, pled not guilty,
    waived speedy trial, and filed a motion for discovery. The district court
    granted the discovery motion and ordered reciprocal discovery.
    B.   Plea Discussions Between the Parties. The State and Doe
    entered plea discussions. A fighting issue was whether the State could
    prove its case of physical abuse based on photographs. Doe argued that
    the photos indicated a skin condition, while the State took the position
    that the bruising was consistent with physical abuse. While the parties
    were engaged in plea discussions, the State continued its investigation by
    gathering medical records pursuant to a subpoena duces tecum.
    The special prosecutor obtained assistance in the matter from
    Assistant Attorney General Denise Timmins.         In the course of plea
    discussions, Doe’s attorney, Alfredo Parrish, disclosed that Dr. Linda
    Railsback had been retained by the defense in connection with the case.
    C. Legal Issues Surrounding Decision to Convene a Grand Jury.
    1. State’s communications with Doe’s retained expert.       Following
    Parrish’s disclosure regarding Dr. Railsback, on August 29, 2018,
    Timmins contacted Railsback by telephone without notice to or permission
    from Doe’s counsel. Timmins asked Railsback if she had been working on
    the case and further asked Railsback whether she had come to an ultimate
    opinion about S.C.’s injuries. Railsback declined to discuss the matter
    with Timmins. Despite Timmins informing Railsback that she would be
    subpoenaed to appear before the grand jury should she not answer
    4
    Timmins’s questions, Railsback continued to decline to discuss the matter
    with Timmins. Two days later, Railsback was served with a subpoena.
    Parrish learned of the conversation and subpoena of Railsback and
    further discovered that other witnesses had been subpoenaed to appear
    before the grand jury who were also John Doe’s witnesses in a related
    child-in-need-of-assistance case.
    2. Hearing on defense motions before the district court.    In early
    September, Doe filed motions with the district court to quash the
    subpoena of Dr. Railsback and to disqualify attorney Timmins from the
    proceeding due to her ex parte contact with Railsback. Doe also sought to
    either quash the grand jury proceedings in their entirety or continue the
    proceedings to explore a challenge under Plain, 
    898 N.W.2d 801
    .
    The district court held a hearing on the motions.      Associates of
    Parrish attended the hearing and advanced arguments on behalf of Doe.
    According to Doe, the State was using the grand jury proceedings primarily
    as a discovery tactic. Doe argued that when a grand jury is convened, the
    State can only call witnesses who the prosecutor believes will present the
    best information for the State. Doe cited article I, section 11 of the Iowa
    Constitution, which generally provides for presentment or indictment by a
    grand jury. Because the State was using the grand jury for an improper
    purpose, Doe asserted that the grand jury proceeding should be quashed.
    Alternatively, Doe sought a continuance to ensure a fair-cross-
    section in the grand jury venire.    Doe argued that the Plain decision
    extends to grand jury composition under article I, sections 10 and 11 of
    the Iowa Constitution and that such a challenge should be mounted before
    the grand jury is sworn under Iowa Rule of Criminal Procedure 2.3(2).
    Next, Doe addressed the motion to quash the subpoena served on
    Railsback. Doe argued that the subpoena of a retained expert violated the
    5
    work-product protection, could go into attorney–client privilege, and
    subverted the grand jury process. Further, Doe asserted the information
    regarding Railsback was provided as part of a confidential plea-bargaining
    process.   Doe argued it would delve too far into the defendant’s own
    investigation of their defense to allow Railsback’s testimony before the
    grand jury. Finally, Doe urged that the district court disqualify Timmins
    and the attorney general’s office from further participation in the case
    because of its improper use of the grand jury as a discovery device.
    On behalf of the State, Timmins made a professional statement. She
    recounted discussions with Doe’s counsel regarding the grand jury.
    Timmins declared that counsel for Doe had told her numerous times that
    Railsback “is going to say that the child has a skin condition.” Timmins
    stated she called Railsback and asked whether her understanding of
    Railsback’s opinion was correct. After Railsback declined to provide any
    information, Timmins advised Railsback that she would receive a
    subpoena. Timmins denied, however, that she threatened Railsback in
    any way. Timmins declared the State was having a difficult time deciding
    what to do with the case and decided to empanel a grand jury and let it
    decide whether to proceed with criminal charges.
    Assistant Attorney General Zachary Miller then presented to the
    district court the outline of the State’s arguments. Through Miller, the
    State advised the court that they were not interested in unauthorized
    discovery but instead wanted to present the grand jury with all the
    available evidence. Although the rules do not require the State to present
    any of the defendant’s evidence, they asserted that caselaw arguably does
    impose such a requirement. In any event, the State argued that its desire
    to present defendant’s potentially exculpatory evidence is sound policy.
    6
    On the issue of staying selection of the grand jury pending
    development of a Plain challenge, the State noted that Doe had not lodged
    a Plain challenge but merely requested a continuance until the information
    to lodge a Plain challenge could be received from the court and evaluated.
    On that basis, the State contends, the district court’s deferral of
    consideration of the merits pending later development of the record was
    proper.
    Turning to the issue of the subpoena to Railsback, the State asserted
    that even if there was some privileged information, the witness could assert
    privilege before the grand jury. The State claimed it was not engaged in a
    fishing expedition to learn about the defendant’s case but only sought to
    present the grand jury with a full array of evidence. Further, the State
    noted that the parties had agreed to reciprocal discovery, and as a result,
    there would be no harm in presenting evidence from Railsback to the grand
    jury.
    On the issue of disqualification, the State maintained that Timmins
    did not cross any ethical line. According to the State, Timmins was simply
    trying to prepare for the grand jury and was attempting to bring pertinent
    information before it to allow the grand jury to make a decision.
    Madison County Attorney Matthew Schultz also appeared for the
    State. Schultz advised the court that the State would ask the grand jury
    to use the beyond-a-reasonable-doubt standard in lieu of the more typical
    probable-cause     standard   when    considering   whether   to   bring   an
    indictment.
    After the parties had presented their positions, the attorneys
    explored exactly what Doe’s primary counsel, Parrish, had told the State
    about Railsback’s potential testimony.       Schultz made a professional
    statement that Parrish had stated that Railsback had reviewed the
    7
    photographs of S.C. and had concluded that they reflected a skin
    condition. Associates of Parrish who were arguing the motion stated they
    were not familiar with the discussions but asserted the discussions were
    confidential.     Timmins responded that there was nothing about the
    conversations suggesting the information revealed by Parrish could not be
    used by the State.        Doe’s attorneys asserted that they themselves
    “specifically have not said to [Dr. Railsback] that she was going to be a
    trial witness. She was retained to help the defense in understanding the
    case.”
    3. Ruling of the district court. Immediately following the argument,
    the district court initially denied Doe’s motion to quash the grand jury,
    reasoning that the court lacked authority to do so. The district court also
    denied a continuance of the proceeding to allow a Plain challenge to the
    make-up of the grand jury, reasoning that such a challenge could be
    considered after the grand jury was sworn and if an indictment was
    returned.
    The district court took the question of the subpoena of Dr. Railsback
    under advisement but later denied the motion in a written ruling. The
    district court concluded that although Railsback should not be allowed to
    testify regarding trial strategy, she could testify about opinions that Doe’s
    counsel had disclosed to the State under a waiver theory.
    Following the rulings, a grand jury was selected and sworn. On
    September 11, however, this court granted Doe’s application for
    interlocutory appeal and stayed the grand jury proceedings.
    II. Standard of Review.
    Ordinarily, we review a district court decision with respect to
    quashing of a subpoena for abuse of discretion. Morris v. Morris, 
    383 N.W.2d 527
    , 529 (Iowa 1986) (“The trial court sustained the motion to
    8
    quash, a ruling which defendants challenge.         A trial court has wide
    discretion in such a ruling.     We find no abuse.” (Citation omitted.)).
    Similarly, this court reviews a district court’s decision not to disqualify a
    prosecutor for abuse of discretion. State v. Iowa Dist. Ct. for Dubuque Cty.,
    
    870 N.W.2d 849
    , 850, 853 (Iowa 2015). The district court’s interpretation
    of statutory language is reviewed for errors of law. State v. Dahl, 
    874 N.W.2d 348
    , 351 (Iowa 2016). The standard of review for district court
    determinations regarding authority and jurisdiction of a district court are
    also reviewed for correction of errors at law. State v. Clark, 
    608 N.W.2d 5
    ,
    7 (Iowa 2000) (en banc).
    III. Discussion.
    A. Validity of State’s Subpoena of Expert Retained by Defense
    in a Criminal Proceeding to Appear and Testify Before a Grand Jury.
    1. Introduction. The first issue in this appeal is whether the State
    may subpoena an expert witness retained by the defense in preparation
    for criminal prosecution to testify before a grand jury proceeding. The
    parties have not cited, nor have we found, authoritative Iowa precedent on
    the issue. An overview of the nature of the grand jury will provide context
    for deciding the issue.
    In State v. Iowa District Court for Johnson County, 
    568 N.W.2d 505
    (Iowa 1997), we discussed the nature of grand juries under Iowa law. In
    doing so, we quoted federal precedent:
    In fact the whole theory of [the grand jury’s] function is that it
    belongs to no branch of the institutional government, serving
    as a kind of buffer or referee between the government and the
    people. Although the grand jury normally operates, of course,
    in the courthouse and under judicial auspices, its
    institutional relationship with the judicial branch has
    traditionally been, so to speak, at arm’s length. Judges’ direct
    involvement in the functioning of the grand jury has generally
    been confined to the constitutive one of calling the grand
    jurors together and administering their oaths of office.
    9
    
    Id. at 508
    (alteration in original) (quoting United States v. Williams, 
    504 U.S. 36
    , 47, 
    112 S. Ct. 1735
    , 1742 (1992)).
    We have also cited with approval the discussion of the federal grand
    jury in United States v. Calandra, 
    414 U.S. 338
    , 
    94 S. Ct. 613
    (1974). See
    State v. Hall, 
    235 N.W.2d 702
    , 712–13 (Iowa 1975) (en banc). In Calandra,
    the United States Supreme Court stated,
    Traditionally the grand jury has been accorded wide
    latitude to inquire into violations of criminal law. No judge
    presides to monitor its proceedings. It deliberates in secret
    and may determine alone the course of its inquiry. The grand
    jury may compel the production of evidence or the testimony
    of witnesses as it considers appropriate, and its operation
    generally is unrestrained by the technical procedural and
    evidentiary rules governing the conduct of criminal trials. “It
    is a grand inquest, a body with powers of investigation and
    inquisition, the scope of whose inquiries is not to be limited
    narrowly by questions of propriety or forecasts of the probable
    result of the investigation, or by doubts whether any
    particular individual will be found properly subject to an
    accusation of 
    crime.” 414 U.S. at 343
    , 94 S. Ct. at 617 (quoting Blair v. United States, 
    250 U.S. 273
    , 282, 
    39 S. Ct. 468
    , 471 (1919)).
    Further, the Calandra Court noted,
    The grand jury’s sources of information are widely
    drawn, and the validity of an indictment is not affected by the
    character of the evidence considered. Thus, an indictment
    valid on its face is not subject to challenge on the ground that
    the grand jury acted on the basis of inadequate or
    incompetent evidence.
    
    Id. at 344–45,
    97 S. Ct. at 618.
    Yet, the cases make clear that the subpoena power of the grand jury
    is not unlimited. 
    Id. at 346,
    94 S. Ct. at 619. Grand jury subpoenas
    cannot violate a valid privilege, whether established by constitution,
    statute, or common law.      
    Id. There is
    also some authority for the
    proposition that grand jury subpoenas may not be unreasonable or
    10
    oppressive. See In re Grand Jury Subpoena, 
    626 F. Supp. 1057
    , 1061
    (D.P.R. 1986) (finding a grand jury subpoena requiring production of “any
    and all records” of a party was overbroad), aff’d in part, rev’d in part sub
    nom. In re Grand Jury Proceedings, 
    814 F.2d 61
    , 73 (1st Cir. 1987); State
    v. Hill, 
    37 N.E.3d 822
    , 827 (Ohio Ct. App. 2015) (finding that the district
    court has the power to review grand jury subpoena for fundamental
    unfairness), aff’d sub nom. In re Cases Held for the Decision in State v.
    Thomas, 
    78 N.E.3d 830
    (Ohio 2016) (mem.).
    Based on these authorities, the question is whether this court
    should quash the grand jury subpoena of Doe’s retained expert.
    2.   Positions of the parties.   Doe advances several arguments to
    support quashing the grand jury subpoena served on Dr. Railsback. First,
    Doe asserts the only information she has is privileged and shielded by
    work-product protection. Doe cites In re Grand Jury Proceedings, 
    473 F.2d 840
    , 846–47 (8th Cir. 1973), for the proposition that statements made by
    witnesses to an attorney have been consistently held to be work product.
    According to Doe, any effort to obtain such information in the manner and
    circumstances of this case is “unheard of.”
    Second, Doe asserts that discovery of an expert witness not expected
    to testify and specially retained in anticipation of litigation may only be
    obtained upon a showing of exceptional circumstances under Iowa Rule of
    Civil Procedure 1.508(2). Doe impliedly argues that the Iowa Rules of Civil
    Procedure apply in a case involving a grand jury subpoena.
    Third, Doe claims the decision to subpoena Railsback without first
    informing the district court or opposing counsel was contrary to the Iowa
    Rules of Evidence. Doe argues that rules on privileges apply “to all stages
    of a case or proceeding.” Iowa R. of Evid. 5.1101(b). Further, rule 5.104
    provides that the court must decide any preliminary question about
    11
    whether a privilege exists. Under the circumstances, Doe asserts that the
    State was required to alert the district court in advance that it intended to
    call Railsback. In support of this assertion, Doe cites State v. Wong, 
    40 P.3d 914
    (Haw. 2002). There, the Hawai‘i Supreme Court held that the
    prosecutor engaged in misconduct by presenting the testimony of the
    defendant’s tax attorney to a grand jury without first seeking judicial
    review on the attorney–client privilege. 
    Id. at 922–23.
    Fourth, Doe argues that the State learned of Railsback’s identity
    through plea negotiations and that such disclosures are confidential. Doe
    argues that lawyers have a duty not to disclose those communications
    under Iowa Rule of Professional Conduct 32:1.6. Further, Doe points out
    that statements made in plea negotiations are inadmissible. See Iowa R.
    Crim. P. 2.10(5). Doe asserts that allowing use of information about an
    expert witness obtained in plea negotiations bargaining will have a chilling
    effect on plea bargaining. Finally, Doe asserts that if the State desired to
    present exculpatory evidence by obtaining Railsback’s testimony, the State
    would have called Doe’s counsel before serving a subpoena on Railsback.
    The State contends that it served the subpoena on Railsback to
    present the grand jury with exculpatory evidence to assist the grand jury
    in its deliberations. In support of this argument, the State cites Hall, 
    235 N.W.2d 702
    . In Hall, we declared that a prosecutor’s duty in a grand jury
    proceeding is “to fairly and dispassionately present not only that evidence
    which tends to prove guilt but also that which is exculpatory in nature.”
    
    Id. at 712.
    The State further cites the ABA’s Criminal Justice Standards
    for the Prosecution Function (ABA Standards) 3-4.6(e), which provides that
    a prosecutor with personal knowledge of evidence which “directly negates
    the guilt of a subject of the investigation” should present or otherwise
    disclose the evidence to the grand jury. Criminal Justice Standards for the
    12
    Prosecution Function, Am. Bar Ass’n (last updated 4th ed. 2017),
    https://www.americanbar.org/groups/criminal_justice/standards/Prose
    cutionFunctionFourthEdition/          [https://perma.cc/ZMJ9-GX38].          The
    State points out that the United States Department of Justice in its Justice
    Manual 9–11.233 adheres to essentially the same position.                Justice
    Manual, U.S. Dep’t of Justice (last visited Feb. 5, 2020), https://
    www.justice.gov/jm/jm-9-11000-grand-jury              [https://perma.cc/6TF7-
    CA5R].
    The   notion   that     a   prosecutor   should   disclose   exculpatory
    information is consistent with Iowa Rule of Criminal Procedure 2.3(4)(g),
    which allows a grand jury to “hear evidence for the defendant.” While Doe
    recognizes that under 
    Williams, 504 U.S. at 55
    , 112 S. Ct. at 1746, there
    may be no duty to disclose exculpatory evidence, that does not mean it is
    not prudent for the prosecution to do so.
    In response to Doe’s argument that any potential testimony by
    Railsback would invade work-product protection, the State responds that
    the Iowa Rules of Civil Procedure do not apply in criminal matters but are
    merely instructive. See State v. Russell, 
    897 N.W.2d 717
    , 725 (Iowa 2017)
    (stating that “[w]hile our rules of civil procedure do not apply to criminal
    matters, they can still be instructive”). Thus, the State rejects the claim
    that it seeks to invade the thoughts of a retained but nontestifying expert
    in violation of rule 1.508(2) because the rule is not applicable. The State
    notes that the discovery rules in the Iowa Rules of Criminal Procedure do
    have expert discovery provisions, though they do not apply until charges
    are filed. See Iowa R. Crim. P. 2.14(2)(b)(1)–(2), .14(3)(b).
    The State further claims that Doe waived any privilege when Parrish
    told the prosecutors the general content of Dr. Railsback’s opinion. The
    State    offers   several     authorities    supporting   the   contention   that
    13
    communicating privileged work product to an adversary waives the
    privilege. See, e.g., Doe No. 1 v. United States, 
    749 F.3d 999
    , 1008 (11th
    Cir. 2014) (“Even if it shared the common goal of reaching a quick
    settlement, the United States was undoubtedly adverse to Epstein during
    its investigation of him for federal offenses, and the intervenors’ disclosure
    of their work product waived any claim of privilege.”); Pittman v. Frazer,
    
    129 F.3d 983
    , 988 (8th Cir. 1997) (“We have stated that disclosure to an
    adversary waives work product protection as to items actually disclosed.”).
    Responding to Doe’s argument that Doe communicated information
    regarding Railsback’s opinion during plea negotiation and that such
    information may not be used by the prosecution, the State argues that
    adoption of this proposition would allow defendants to “inoculate
    themselves from harmful evidence” by disclosing it in plea negotiations.
    According to the State, the plea discussions themselves cannot be
    admitted into evidence. See Iowa R. Evid. 5.410(a)(4).
    With respect to Doe’s claimed entitlement to a hearing before the
    district court on the privilege issue, the State claims that Doe misreads
    Iowa Rule of Evidence 5.104(a) relating to the district court’s authority to
    determine privilege claims. The State argues, however, that the notion of
    providing notice and a hearing to resolve privilege questions would
    undermine the secrecy of grand jury proceedings established in Iowa Rule
    of Criminal Procedure 2.3(4)(d) (“Every member of the grand jury, and its
    clerks, bailiffs, and court attendants, shall keep secret the proceedings of
    that body and the testimony given before it . . . .”).
    In any event, the State points out that Doe received a hearing before
    the district court when it denied the motion to quash. The State notes
    that the district court ordered the State not to seek Doe’s trial strategy
    when examining Dr. Railsback. When appearing before the grand jury,
    14
    the State contends, Railsback can claim privilege when testifying and the
    district court will then decide the claim.
    3. Discussion. Doe asserts that both the work-product protection
    and attorney–client privilege require that the subpoena be quashed in this
    case. At the outset, as a general matter, we find it clear that the privileges
    themselves do apply in grand jury proceedings. It is, perhaps, not entirely
    clear that grand jury deliberations are a “case or proceeding” under the
    Iowa Rule of Criminal Procedure 5.1101(b). As a result, there may be some
    doubt as to whether the protection of privileges afforded under the rule
    applies. But even if the privilege protection in rule 5.1101(b) is not directly
    applicable to grand jury proceedings, we would hold that these firmly
    established common law doctrines of work-product protection and
    attorney–client privilege apply to grand jury proceedings. The State does
    not argue to the contrary.
    We now turn briefly to the scope of the privileges. Attorney–client
    privilege is vaguely defined in Iowa Rule of Evidence 5.502(g)(1) as “the
    protection that applicable law provides for confidential attorney–client
    communications.” But Doe does not clearly articulate how attorney–client
    privilege is implicated here.
    Iowa Rule of Evidence 5.502(g)(2) defines work-product protection
    as “the protection that applicable law provides for tangible material (or its
    intangible equivalent) prepared in anticipation of litigation or for trial.”
    (Emphasis added.)     While Dr. Railsback had not yet prepared tangible
    work-product for Doe, the rule would protect an intangible equivalent,
    such as the tentative conclusions or observations that Railsback had
    shared with Doe’s counsel. To the extent the State claims that Railsback
    may have exculpatory information, much if not all of it would be shielded
    by work-product protection.
    15
    In addition, we take instruction from the Iowa Rule of Civil
    Procedure 1.508(2) related to discovery of expert witnesses. Ordinarily, in
    a circumstance like this, a retained nontestifying expert is not subject to
    discovery unless the State has demonstrated exceptional circumstances,
    a necessary prerequisite showing to permit testimony from the defense’s
    retained but nontestifying expert. We do not think a grand jury subpoena
    may be used to circumvent this generally applicable rule and the policies
    that support it. We therefore conclude that, absent waiver, the district
    court should have quashed the grand jury subpoena of Dr. Railsback.
    The State contends that if work-product protection attached in this
    case that it had certainly been waived by Doe’s counsel. The fighting issue
    here is the scope of Iowa Rule of Evidence 5.410(a)(4).      This provision
    makes inadmissible “[a] statement made during plea discussions with an
    attorney for the prosecuting authority if the discussions do not result in a
    guilty plea or they resulted in a later-withdrawn guilty plea.” Iowa R. Evid.
    5.410(a)(4).
    Doe argues that the provision prevents the prosecution from using
    information it obtained in the plea-bargaining process to identify witnesses
    to subpoena before the grand jury. It amounts, essentially, to a fruit-of-
    the-poisonous-tree argument. But the language of the rule is not helpful
    to Doe. It only provides that any statement made in the course of a plea
    bargain is inadmissible. It is the statements of Parrish to prosecutors that
    are thus inadmissible, not Railsback’s opinion.      Indeed, this would be
    consistent with our caselaw. For example, in Exotica Botanicals, Inc. v.
    Terra International, Inc., 
    612 N.W.2d 801
    , 809 (Iowa 2000), we found that
    work-product protections were not waived through discussion with
    opposing counsel. The court stated,
    16
    But to say that [an individual] waived his work product
    privilege concerning information that might potentially
    absolve [a client] of liability, simply by discussing the general
    nature of that information with [an opposing party], would
    mean that an attorney could never discuss the positive
    aspects of his or her case with opposing counsel for fear that
    such discussion would amount to a waiver of the work
    product privilege as to all documents supporting that position.
    If this were the case, settlement negotiations and
    communication between the parties in general would break
    down.     Such a result would be inconsistent with a
    commonsense application of the work product doctrine and
    certainly inconsistent with the goal of resolving cases in a
    timely manner.
    
    Id. But that
    does not mean that information communicated in plea-
    bargaining cannot be pursued by the prosecution. For example, in United
    States v. Cusack, 
    827 F.2d 696
    , 697–98, 697 nn.1–2 (11th Cir. 1987) (per
    curiam), the Eleventh Circuit considered a case in which evidence was
    seized under a search warrant where probable cause for the warrant was
    supplied by defendant’s plea negotiation statements.         The governing
    language in the rule applied in Cusack, Federal Rule of Criminal Procedure
    11(e)(6)(D), uses language similar to Iowa Rule of Evidence 5.410(a)(4).
    Compare 
    id. 697 n.3
    (quoting Fed. R. Crim. P. 11(e)(6)(D)), with Iowa R.
    Evid. 5.410(a)(4). The Cusack court held that the rule did not prohibit
    derivative use of statements but only the admission of the statements
    themselves. 
    Id. at 697–98;
    see also United States v. Ware, 
    890 F.2d 1008
    ,
    1012 (8th Cir. 1989) (holding that defendants introduction of a potential
    witness to the government during plea discussions was not within the
    scope of the rule); United States v. Rutkowski, 
    814 F.2d 594
    , 598 (11th Cir.
    1987) (per curiam) (finding that reexamination of evidence due to
    statements made in plea-bargaining was permissible); United States v.
    Fronk, 
    173 F.R.D. 59
    , 62 (W.D.N.Y. 1997) (stating that evidence derived
    from statements in the plea-bargain process are admissible).
    17
    Yet, in this case, the fact that evidence derivative of statements may
    be admitted does not save the day for the State. Here, the only way the
    State can show that Parrish waived the work-product doctrine would be to
    use his statement in plea negotiations. Plea discussions themselves are
    not admissible. Iowa R. Crim. P. 2.10(5). As a result, the State cannot
    use the statement made by Parrish to prosecutors to establish the
    necessary foundation for waiver. Thus, Doe is entitled to press their work-
    product claim in its entirety.
    For the above reason, we conclude that the district court erred in
    not quashing the grand jury subpoena of Dr. Railsback.
    B. Disqualification Issue.
    1. Introduction. Doe seeks the disqualification of counsel because
    “she   directly   contacted   defense    counsel’s   expert   and   demanded
    information about the matter.” The district court overruled the motion.
    No constitutional error was presented to or ruled upon by the district
    court, and as a result, these claims are not preserved. Our review of a
    decision related to disqualification of a prosecutor is for abuse of
    discretion. Iowa Dist. Ct. for Dubuque 
    Cty., 870 N.W.2d at 853
    .
    2. Positions of the parties. Doe asserts that under Iowa District Court
    for Dubuque County, a prosecutor may be disqualified for engaging in
    behavior that amounted to a conflict of interest “or otherwise cause them
    to seek results that are unjust or adverse to the public interest.” 
    Id. at 853
    (quoting Allan L. Schwartz & Denny R. Veilleux, Annotation,
    Disqualification of Prosecuting Attorney in State Criminal Case on Account
    of Relationship with Accused, 
    42 A.L.R. 5th 581
    , 581 (1996) [hereinafter
    Schwartz & Veilleux]). Doe claims the “unjust or adverse to the public
    interest” prong is implicated in this case. Doe buttresses the unjust or
    adverse to the public interest claim with a citation to the ABA Standard 3-
    18
    4.6(i) requiring a prosecutor to consider the “applicable law and rules of
    professional responsibility” before issuing grand jury subpoenas to
    opposing parties and witnesses.       Criminal Justice Standards for the
    Prosecution Function, Am. Bar Ass’n. Combining the Iowa District Court for
    Dubuque County case and the ABA Standards, it appears that Doe is
    arguing that illegal conduct or violation of the Iowa Rules of Professional
    Conduct by a prosecuting attorney may give rise to results that are “unjust
    and adverse to the public interest” and require disqualification. Iowa Dist.
    Ct. for Dubuque 
    Cty., 870 N.W.2d at 853
    (quoting Schwartz & 
    Veilleux, 42 A.L.R. 5th at 581
    ).
    To establish illegality, Doe points to Iowa Rule of Civil Procedure
    1.508(2) as “instructive.”   Although the rule relates to discovery, Doe
    argues that it would be meaningless if an attorney were allowed to contact
    the opponent’s expert witness directly. As a result, according to Doe, a
    no-contact rule prohibiting parties from contacting an opposing expert is
    ordinarily enforced. See George M. Cohen, Beyond the No-Contact Rule:
    Ex Parte Contact by Lawyers with Nonclients, 87 Tul. L. Rev. 1197, 1209–
    10 (2013) [hereinafter Cohen].
    Doe specifically cites Erickson v. Newmar Corp., 
    87 F.3d 298
    , 301–
    02 (9th Cir. 1996). In Erickson, the Ninth Circuit considered a situation
    where an attorney had hired a pro se plaintiff’s expert on another case,
    thus gaining access to the opposing party’s expert. 
    Id. at 300.
    The Ninth
    Circuit observed that there was a scarcity of caselaw on the topic, “possibly
    because the violation seldom happens.” 
    Id. at 302.
    The Ninth Circuit cited
    an ethics treatise and two ethics opinions standing for the proposition that
    such conduct was “impliedly prohibited” by the existing rules of civil
    procedure and ethics rules. 
    Id. at 301–02
    (citing 2 Geoffrey C. Hazard &
    W. William Hodes, The Law of Lawyering § 3.4:402 (2d ed. Supp. 1994);
    19
    ABA Comm’n on Ethics & Prof’l Responsibility, Formal Op. 93–378 (1993);
    Or. St. Bar Ass’n, Formal Op. 1992–132 (1992)).           The Ninth Circuit
    reversed the district court’s judgment in favor of the defendant and
    instructed the district court to impose appropriate sanctions and
    disciplinary action upon defense counsel. 
    Id. at 304.
    The State contends that Iowa District Court for Dubuque County does
    not permit such a free-standing basis for disqualification and that Doe
    must prove a conflict of interest which either (a) “prejudiced [the
    prosecutor] against the accused,” or (b) “cause[d] them to seek results that
    are unjust or adverse to the public 
    interest.” 870 N.W.2d at 853
    (quoting
    Schwartz & 
    Veilleux, 42 A.L.R. 5th at 581
    ). The State does not directly
    address, however, the issue of ex parte contact with a retained expert of
    an opposing party. In any event, even if the district court could disqualify
    the prosecutor on that basis, it properly exercised its discretion in
    declining to do so.
    3. Discussion. Under Iowa District Court for Dubuque County, a
    prosecutor may be disqualified by a district court if “they have a conflict
    of interest which might prejudice them against the accused or otherwise
    cause them to seek results that are unjust or adverse to the public
    interest.” 
    Id. (quoting Schwartz
    & 
    Veilleux, 42 A.L.R. 5th at 581
    ). Doe
    takes the position that this anguage permits disqualification of a
    prosecutor solely on a finding that they sought results which are “unjust
    or adverse to the public interest.” 
    Id. When read
    as a whole, however, it is clear that under Iowa District
    Court for Dubuque County, there must first be a prerequisite showing of
    alleged conflict of interest, followed by either a showing of prejudice against
    the defendant or unjust results. 
    Id. Indeed, to
    permit disqualification
    solely on the basis that the prosecutor sought results which are unjust or
    20
    contrary to the public interest would make such determination
    conditioned on a judge’s subjective interpretation of the meaning of
    “unjust” or “adverse to the public interest.” Depending on the specific
    allegations, this may also intrude on the prosecutor’s freedom from judicial
    oversight when bringing claims. See Iowa Dist. Ct. for Johnson 
    Cty., 568 N.W.2d at 508
    . Doe has not sufficiently alleged a conflict of interest, thus
    disqualification under Iowa District Court for Dubuque County is not
    warranted. 
    See 870 N.W.2d at 849
    .
    The State further argued that a showing of prejudice should be
    required prior to disqualification based on a prosecutor seeking results
    that are unjust and contrary to public policy. Since we have declined to
    adopt disqualification on this basis, we also decline to address this issue
    further.
    In support of his contention, Doe relies on the ABA Standards. In
    particular, Doe relies on standard 3-4.6(i), which cautions prosecutors
    against issuing “a grand jury subpoena to a criminal defense attorney or
    defense team member, or other witness whose testimony reasonably might
    be protected by a recognized privilege, without considering the applicable
    law and rules of professional responsibility in the jurisdiction.” Criminal
    Justice Standards for the Prosecution Function, Am. Bar Ass’n. Violations
    of ABA Standards have previously been considered by this court in
    disqualification determinations. See Iowa Dist. Ct. for Dubuque 
    County, 870 N.W.2d at 856
    (“Although [the ABA Standards] are ‘not intended to be
    used as criteria for . . . judicial evaluation,’ the standards still ‘may or may
    not be relevant in such judicial evaluation, depending upon all the
    circumstances.’    ”   (quoting   ABA    Standards    for   Criminal   Justice:
    Prosecution Function and Defense Function 3-1.1, at 3 (3d ed. 1993));
    Blanton v. Barrick, 
    258 N.W.2d 306
    , 311 (Iowa 1977) (holding that,
    21
    although violation of the statute governing disqualification of county
    attorneys may also violate the ABA Standards, it did not warrant complete
    abrogation of judicial immunity).
    Doe further suggests that Timmins violated a no-contact rule which
    would prohibit counsel from engaging in ex parte communications with an
    expert retained by an opposing party. In support, Doe relies on Iowa Rule
    of Civil Procedure 1.508(2) and its specific explication concerning
    discovery of a nontestifying expert. The purposes of the no-contact rule
    include preventing the circumvention of the court’s carefully prescribed
    rules concerning discovery of experts and preventing the inadvertent
    disclosure of privileged or confidential information. Cohen, 87 Tul. L. Rev.
    at 1210–11.
    Further the ABA has issued a formal ethics opinion on the subject,
    which states,
    [Model] Rule 3.4(c) requires a lawyer to conform to the rules
    of a tribunal before which a particular matter is pending, and
    it is under this Rule that the matter of expert witnesses comes
    into particular focus. The rules of procedure of many
    tribunals contain specific and exclusive procedures for
    obtaining the opinions, and the bases therefor, of the experts
    who may testify for the opposing party. The leading rule in
    this regard is Fed.R.Civ.P.Rule 26(b)(4)(A), which sets forth a
    two-step process that must be followed in order to obtain
    discovery of facts and opinions held by an adversary’s expert
    who is expected to testify at trial: first, written interrogatories
    are to be served; second, if additional discovery is desired,
    leave of court must be obtained.
    ....
    The Committee therefore concludes that, although the
    Model Rules do not specifically prohibit a lawyer in a civil
    matter from making ex parte contact with the opposing party’s
    expert witness, such contacts would probably constitute a
    violation of Rule 3.4(c) if the matter is pending in federal court
    or in a jurisdiction that has adopted an expert-discovery rule
    patterned after Federal Rule 26(b)(4)(A). Conversely, if the
    matter is not pending in such a jurisdiction, there would be
    no violation.
    22
    ABA Comm’n on Ethics & Prof’l Responsibility, Formal Op. 93–378, at 2–
    3.   A number of cases have held similarly. See, e.g., Young v. S. Cal.
    Transp., Inc., No. 2:08cv247KS-MTP, 
    2010 WL 916665
    , at *12 (S.D. Miss.
    Mar. 10, 2010) (“[Federal Rule of Civil Procedure 26(b)(4)(B)] makes no
    provision for ex parte communication with a party’s expert witness by the
    opposing party.”); Carlson v. Monaco Coach Corp., No. CIV-S-05-0181
    LKK/GGH, 
    2006 WL 1716400
    , at *10 (E.D. Cal. Apr. 20, 2006) (“[T]he
    careful scheduling of experts’ disclosures and discovery by the district
    court would be for naught if the parties could back door these provisions
    with informal contacts of an adversary’s experts.”); Olson v. Snap Prods.,
    Inc., 
    183 F.R.D. 539
    , 542 (D. Minn. 1998) (“By implication, ex parte
    contacts with expert witnesses, in order to discover their opinions, are
    prohibited.”).
    In examining these authorities, one obvious commonality emerges:
    they do not involve grand jury proceedings. There are no current rules
    relating to grand jury proceedings. In fact, at least one other jurisdiction
    has found that contacting expert witnesses within the context of a criminal
    case is permissible. 1
    The issue before us is whether the district court abused its
    discretion in declining to disqualify Timmins because of her brief phone
    call with Dr. Railsback and her subpoena of Railsback to appear before
    the grand jury. As a reviewing court, we only consider whether the district
    court abused its discretion in declining to disqualify Timmins. As to the
    1In Formal Opinion No. 2005-131, the Oregon board of governors adopted a
    framework allowing for contacting adverse expert witnesses within the context of a
    criminal proceeding. Or. St. Bar Ass’n, Formal Op. 2005–131 (2005). This opinion,
    although informative, is distinguishable from the case at hand as it does not make a clear
    enough distinction between testifying and nontestifying witnesses for our purpose, is
    based in part on Oregon caselaw which has grown around the discovery process, and
    deals with ordinary criminal proceedings rather than our present grand jury context.
    23
    phone call, it may have been a mistake, and even improper, to ask
    Railsback to state her opinions ex parte, but it does not arise to such
    egregious misconduct in this unclear area of law to allow us to say that
    the district court abused its discretion in failing to disqualify Timmins. As
    to the issuance of the subpoena, it may have crossed the line, as we have
    now drawn it, but it does not amount to the kind of misconduct that
    requires, as a matter of law, the disqualification of Timmins.
    C. Authority of a District Court to Generally Quash Grand
    Juries.
    1. Introduction. Doe seeks to generally quash the grand jury. He
    does not simply seek to quash a grand jury indictment. See, e.g., State v.
    Boucher, 
    237 Iowa 772
    , 774, 
    23 N.W.2d 851
    , 852 (1946). Nor does Doe
    seek to quash a grand jury subpoena pursuant to Iowa Rules of Civil
    Procedure 1.1701 and 1.1702. Instead, Doe wants to terminate the grand
    jury proceeding in toto.
    2. Positions of the Parties. Doe recognizes the unusual posture of
    the grand jury in our institutional design. Doe notes that a grand jury “is
    not an adjunct of either the court or the prosecutor.” Iowa Dist. Ct. for
    Johnson 
    Cty., 568 N.W.2d at 508
    . Doe notes we have held that a district
    court cannot use the grand jury as a sword to coax the county attorney to
    bring a charge they would not otherwise pursue. 
    Id. at 509.
    But, Doe
    distinguishes judicial intervention to use the grand jury as a prosecutorial
    sword with judicial oversight of the grand jury as a shield against
    prosecutorial misconduct.     In support, Doe observes that in State v.
    Paulsen, 
    286 N.W.2d 157
    , 159–61 (Iowa 1979) (en banc), that we
    considered but rejected on the merits a due process claim that a
    prosecutor “improperly influenced” the grand jury.       See also 
    Hall, 235 N.W.2d at 712
    .
    24
    Operating from the premise that the judicial branch has authority
    to ensure the constitutionality of grand jury proceedings, Doe proceeds to
    assert that prosecutors violated Doe’s constitutional rights by using the
    grand jury proceeding as a preindictment discovery tool. Doe attacks the
    State for using the subpoena power of the grand jury to call Doe, Doe’s
    family members, Doe’s coworkers, and Doe’s retained expert as a tactic
    that “subverts the purpose of the grand jury proceeding[,]” which is to
    determine if there is an adequate basis for bringing a charge. See 
    Williams, 504 U.S. at 51
    , 112 S. Ct. at 1744 (finding that “the grand jury sits not to
    determine guilt or innocence, but to assess whether there is adequate
    basis for bringing a criminal charge”). Doe asserts without elaboration
    that the State’s claim that it sought to present “a complete picture” to the
    grand jury violated article I, sections 9, 10, and 11 of the Iowa
    Constitution.
    Doe relies heavily here on Wong as instructive. In Wong, the circuit
    court found misconduct when prosecutors subpoenaed witnesses for a
    grand jury that would likely provide privileged attorney–client testimony,
    but did not first seek a court ruling regarding the extent to which those
    witnesses could 
    testify. 40 P.3d at 917
    .     The Wong court ultimately
    affirmed dismissal of the indictments for prosecutorial misconduct. 
    Id. at 930.
    The State vigorously responds.    It notes that the Iowa Rules of
    Criminal Procedure provide authority to challenge a panel or an individual
    grand juror, or to dismiss indictments, but not challenge to the entire
    proceeding. See Iowa R. Crim. P. 2.3(2)(c); 
    id. r. 2.11(6)(a)–(b).
    The State
    notes, for example, that in Wong the district court dismissed indictments,
    but did not quash a grand jury proceeding in whole.
    25
    Even if the court had the power to “quash the grand jury,” the State
    asserts that this is not the case to do it. While Doe complains about the
    State’s subpoenas for defense witnesses, the rules specifically state that
    “[t]he grand jury is not bound to hear evidence for the defendant, but may
    do so.” Iowa R. Crim. P. 2.3(4)(g). The State further cites ABA Standards
    3-4.6(i), suggesting prosecutors may have an ethical obligation to present
    evidence from the defendant.     Further, the State cites the difficulty in
    determining whether evidence is helpful or harmful to the prosecution or
    defendant. Finally, the State notes that the grand jury has investigative
    purposes which would be defeated by enforcement of a rule that only
    inculpatory evidence may be presented. See 
    Paulsen, 286 N.W.2d at 160
    .
    The State claims that it was not engaged in discovery, but was instead
    seeking to present the grand jury with evidence to make a judgment about
    the case.
    Finally, the State notes the procedural posture of this case. In fact,
    the district court held a hearing prior to any presentation of testimony
    before the grand jury. The situation is thus materially different than in
    Wong, where the State was ordered not to present testimony from
    attorneys without first seeking a judicial determination but defied the
    order and presented the evidence anyway. 
    Wong, 40 P.3d at 925
    .
    3. Discussion. We begin with a brief review of the status of the grand
    jury and its relationship to the judicial branch. As a general proposition,
    [g]iven the grand jury’s role as an independent body,
    however, the district court’s supervisory power is “a very
    limited one.” It does not “permit judicial reshaping of the
    grand jury institution.” Rather, it may be used only to
    “preserve or enhance the traditional functioning” of the grand
    jury. For example, a district court does not have the power to
    order a prosecutor to present exculpatory evidence to a grand
    jury. Such an order would be inappropriate because, rather
    than “enhancing the traditional functioning” of a grand jury,
    it would “alter the grand jury’s historical role.”
    26
    Carlson v. United States, 
    837 F.3d 753
    , 762 (7th Cir. 2016) (quoting
    
    Williams, 504 U.S. at 50
    –51, 112 S. Ct. at 1735). If the district court does
    not have authority to order that exculpatory evidence be presented, it
    seems logical that it may not have authority to order that exculpatory
    evidence be excluded.
    We further note that the Iowa Rules of Criminal Procedure establish
    several potential judicial remedies, but do not authorize quashing of a
    grand jury. We do not find that oversight inadvertent. The exercise of
    judicial branch powers should generally remain within the established
    guardrails.   Even if there were constitutional problems or other errors
    associated with a grand jury proceeding, the remedy lies not in seeking to
    disband the grand jury, a constitutionally established entity, but in
    dismissal of the indictment.
    D. Timeline for Challenges to Grand Jury Arrays Under Plain.
    1. Introduction. The final issue before the court in this case pertains
    to when a defendant may make a fair-cross-section Plain challenge within
    a grand jury context. See Plain, 
    898 N.W.2d 801
    . The parties do not
    dispute that Doe is entitled to raise a Plain challenge to the composition of
    the grand jury.    They battle over whether Doe raised a timely Plain
    challenge and whether the district court erred in swearing a grand jury
    and deferring resolution of Doe’s Plain challenge.
    The relevant rule is Iowa Rule of Criminal Procedure 2.3(2)(a). This
    rule provides,
    Challenge to array. A defendant held to answer for a public
    offense may, before the grand jury is sworn, challenge the
    panel or the grand jury, only for the reason that it was not
    composed or drawn as prescribed by law. If the challenge be
    sustained, the court shall thereupon proceed to take remedial
    action to compose a proper grand jury panel or grand jury.
    
    Id. 27 2.
    Positions of the parties. Doe relies upon the plain language of
    Iowa Rule of Criminal Procedure 2.3(2), interpreting the rule to mean that
    a Plain challenge must be made prior to the convening of a grand jury.
    Doe claims that he needed additional time to gather the necessary
    information to support the challenge, hence the motion for continuance.
    Doe also states that a balancing of equities between judicial efficiency and
    prejudice would necessarily favor him.      Finally, Doe asserts that mere
    preservation of the issue by the court for a later decision is an inadequate
    remedy.
    The State counters that Doe did not make a timely Plain challenge,
    and instead only sought a continuance to determine if he could make a
    Plain challenge. That, according to the State, is not good enough under
    Iowa Rule of Criminal Procedure 2.3(2)(a).        In any event, the State
    maintains that nothing in rule 2.3(2) requires that a Plain challenge be
    decided prior to the swearing of a grand jury. While the State notes the
    district court is required to take remedial action if a Plain challenge is
    founded, that does not require remedial action before the grand jury is
    sworn.    Indeed, the State points out, there is nothing in the rule that
    establishes a timetable for a judicial ruling on the issue.
    According to the State, the district court’s handling of the matter
    was appropriate for reasons of efficiency.     The citizens comprising the
    array had arrived at the courthouse, and witnesses were subpoenaed and
    scheduled to testify. According to the State, the makeup of the grand jury
    should be presumed constitutional so there was no basis for delay. If Doe
    developed a successful Plain challenge, the indictment against him could
    then be dismissed.
    3. Discussion. As a preliminary issue, the State claims that Doe did
    not raise a Plain challenge but only filed a motion to continue to allow him
    28
    to challenge the composition of the jury. The motion includes the label
    “Motion to Challenge Grand Jury,” but in the text it seeks to continue the
    grand jury in order to challenge the composition of the grand jury. This
    pleading is hardly a model of clarity. The district court denied the motion
    to continue but held that the Plain claim could be raised at a later date.
    Iowa Rule of Criminal Procedure 2.3(2)(a) states that a defendant
    “may” raise what is now called a Plain-type challenge before the grand jury
    is sworn. It is not clear that “may” means “must.” In any event, we think
    the filing of the document entitled “Motion to Challenge Grand Jury” with
    text seeking a continuance to gather information to support a potential
    challenge is sufficient compliance to satisfy the rule, even if it is mandatory
    in nature. The parties and the district court were on adequate notice of
    the potential Plain challenge prior to the swearing of the grand jury.
    We now move to the major issue, namely, whether the rule requires
    not only that a challenge be filed prior to the swearing of the grand jury
    but also whether the matter must be decided before the grand jury is
    sworn. The rule does not say that. It does say that if the challenge is
    sustained, the court shall take appropriate action to compose a proper
    grand jury panel or proceeding, but that can occur after a grand jury is
    sworn.
    Doe makes a fair point that by allowing the grand jury proceedings
    to continue, the proceedings may ultimately be for naught if he prevails on
    his Plain claim.    But he is not harmed by the grand jury receiving
    testimony. He is harmed by grand jury action. The district court and the
    parties should expeditiously resolve the issue, but allowing the grand jury
    to sit and receive previously scheduled testimony while the Plain challenge
    is developed by the parties is not a substantial injustice.
    29
    IV. Conclusion.
    For the above reasons, the judgment of the district court is affirmed
    in part, reversed in part, and remanded with directions.
    AFFIRMED IN PART, REVERSED IN PART, AND REMANDED
    WITH DIRECTIONS.
    All justices concur except McDonald, J., who concurs in part and
    dissents in part.
    30
    #18–1534, In re 2018 Grand Jury of Dallas Cty.
    McDONALD, Justice (concurring in part and dissenting in part).
    I respectfully concur in part and dissent in part. I concur in all parts
    of the majority opinion except its reversal of the district court’s ruling on
    the motion to quash the grand jury subpoena. On that issue, I respectfully
    dissent.
    This court reviews the district court’s ruling on a motion to quash a
    subpoena for an abuse of discretion. See Morris v. Morris, 
    383 N.W.2d 527
    , 529 (Iowa 1986) (applying an abuse of discretion standard); Mason v.
    Robinson, 
    340 N.W.2d 236
    , 243 (Iowa 1983) (stating “we conclude our trial
    courts have wide discretion to quash subpoenas or issue protective
    orders”). “Reversal is warranted only if the grounds relied on by the district
    court are clearly unreasonable or untenable.” Pattison Bros. Miss. River
    Terminal, Inc. v. Iowa Dist. Ct., 
    630 N.W.2d 782
    , 787 (Iowa 2001). This
    court’s mere disagreement with the district court’s discretionary ruling is
    not enough to warrant reversal under this standard. This court is not to
    substitute its collective judgment for that of the district court. Instead,
    under an abuse of discretion standard, this court must affirm the district
    court’s discretionary ruling absent a firm and definite conviction the ruling
    is “beyond the pale of reasonable justification under the circumstances”
    presented—a decision so flawed and prejudicial to the administration of
    justice that this court must provide relief. See Harman v. Apfel, 
    211 F.3d 1172
    , 1175 (9th Cir. 2000).
    The grand jury is an integral part of our constitutional
    heritage which was brought to this country with the common
    law. The Framers, most of them trained in the English law
    and traditions, accepted the grand jury as a basic guarantee
    of individual liberty . . . .
    31
    United States v. Mandujano, 
    425 U.S. 564
    , 571, 
    96 S. Ct. 1768
    , 1774
    (1976). The grand jury functions as both a sword and a shield. See Admin.
    Office of U.S. Cts., Handbook for Federal Grand Jurors 4 (Rev. Apr. 2012),
    www.uscourts.gov/sites/default/files/grand-handbook.pdf (“[T]he grand
    jury operates both as a ‘sword,’ authorizing the government’s prosecution
    of suspected criminals, and also as a ‘shield,’ protecting citizens from
    unwarranted or inappropriate prosecutions.”).       Its purpose is both to
    investigate criminal conduct and to protect citizens against unfounded
    criminal charges.   See Branzburg v. Hayes, 
    408 U.S. 665
    , 686–87, 
    92 S. Ct. 2646
    , 2659 (1972).     The grand jury’s authority, particularly its
    investigative authority, is broad. See United States v. Calandra, 
    414 U.S. 338
    , 344, 
    94 S. Ct. 613
    , 618 (1974) (“The grand jury’s investigative power
    must be broad if its public responsibility is adequately to be discharged.”).
    Indispensable to the grand jury is the authority to compel the attendance
    and testimony of witnesses and to require the production of evidence. See
    Kastigar v. United States, 
    406 U.S. 441
    , 443, 
    92 S. Ct. 1653
    , 1655 (1972);
    see generally United States v. White, 
    322 U.S. 694
    , 
    64 S. Ct. 1248
    (1944).
    The grand jury’s authority to compel witness testimony and require the
    production of evidence rests on the well-established principle that “the
    public . . . has a right to every man’s evidence.” 
    Branzburg, 408 U.S. at 688
    , 92 S. Ct. at 2660 (quoting United States v. Bryan, 
    339 U.S. 323
    , 331,
    
    70 S. Ct. 724
    , 730 (1950)). “When called by the grand jury, witnesses are
    thus legally bound to give testimony.” 
    Mandujano, 425 U.S. at 572
    , 96
    S. Ct. at 1774.
    Of course, the grand jury’s authority to obtain every man’s evidence
    is subject to statutory and common law privileges. See 3 Wayne R. LaFave
    et al., Criminal Procedure § 8.6(b), at 156 (4th ed. 2015). I thus agree with
    the majority opinion that the work-product protection can be asserted in
    32
    grand jury proceedings. See, e.g., In re Grand Jury Proceedings, G.S. &
    F.S., 
    609 F.3d 909
    , 912 (8th Cir. 2010) (“Ordinarily, attorney-client
    communications and attorney work product are not discoverable, even in
    a grand jury investigation.”); In re Green Grand Jury Proceedings, 
    492 F.3d 976
    , 979 (8th Cir. 2007) (“Attorney-client communications and attorney
    work product are privileged and are not ordinarily discoverable—even by
    the grand jury.”).
    Although I agree the work-product protection can be asserted in
    grand jury proceedings, I disagree with the majority opinion’s apparent
    conclusion that a target or witness’s assertion of the work-product
    protection requires that a grand jury subpoena be quashed.              The
    application and scope of the work-product doctrine is nuanced and fact-
    specific. Nowhere is this truer than in a grand jury investigation. In the
    context of a grand jury investigation, the protection afforded work product
    is to some extent unsettled and may be different than in other contexts.
    See, e.g., In re Grand Jury Subpoena Dated July 6, 2005, 
    510 F.3d 180
    ,
    184–85 (2d Cir. 2007) (“It is clear that the work product doctrine applies
    to grand jury proceedings, but arguably less clear what species of work
    product protection a court should apply.”); In re Green Grand Jury
    
    Proceedings, 492 F.3d at 981
    (drawing a distinction between the
    discoverability of opinion work product and ordinary work product in
    grand jury proceedings); In re Grand Jury Subpoena, 
    220 F.R.D. 130
    , 142
    (D. Mass. 2004) (“The work product doctrine’s ‘scope and effect outside the
    civil discovery context is largely undefined,’ however, and its application
    in cases involving grand jury subpoenas is particularly unsettled.”
    (quoting In re San Juan Dupont Plaza Hotel Fire Litig., 
    859 F.2d 1007
    , 1013
    (1st Cir. 1988))). “This is partly because of the unique significance of the
    grand jury in our system of government: ‘Nowhere is the public’s claim to
    33
    each person’s evidence stronger than in the context of a valid grand jury
    subpoena.’ ” In re Grand Jury 
    Subpoena, 220 F.R.D. at 142
    (quoting In re
    Sealed Case, 
    676 F.2d 793
    , 806 (D.C. Cir. 1982)). The grand jury is sui
    generis. “[I]t belongs to no branch of the institutional [G]overnment . . . .”
    State v. Iowa Dist. Ct., 
    568 N.W.2d 505
    , 508 (Iowa 1997) (quoting United
    States v. Williams, 
    504 U.S. 36
    , 47, 
    112 S. Ct. 1735
    , 1742 (1992)). It is a
    “grand inquest” whose investigations are “not to be limited narrowly by
    questions of propriety.”    Calandra, 414 U.S. at 
    343, 94 S. Ct. at 617
    (quoting Blair v. United States, 
    250 U.S. 273
    , 282, 
    39 S. Ct. 468
    , 471
    (1919)).
    Given the nuanced and fact-specific inquiry required to resolve an
    assertion of work-product protection in response to a grand jury
    subpoena, I cannot conclude the district court’s discretionary ruling to
    deny the motion to quash was beyond the pale of reasonable justification
    under the circumstances presented. Indeed, it seems to me the district
    court’s ruling might be preferable to the majority’s resolution of the issue.
    Denying the motion to quash and allowing the grand jury to continue its
    inquest while at the same time allowing the witness to assert the privilege
    in response to specific questions would allow for the development of a
    better record to determine whether the question posed to the witness
    actually sought information protected by the work-product doctrine,
    whether the witness had standing to assert the work-product doctrine as
    a ground for refusing to answer the question, and whether the information
    was nonetheless discoverable notwithstanding the assertion of work-
    product protection. This more nuanced approach has been adopted by
    other courts in response to a grand jury witness’s assertion of a privilege.
    See, e.g., 
    Mandujano, 425 U.S. at 575
    , 96 S. Ct. at 1776 (“The stage is
    therefore set when the question is asked. If the witness interposes his
    34
    privilege, the grand jury has two choices. If the desired testimony is of
    marginal value, the grand jury can pursue other avenues of inquiry; if the
    testimony is thought sufficiently important, the grand jury can seek a
    judicial determination as to the bona fides of the witness’ Fifth Amendment
    claim . . . .”); In re Grand Jury Subpoena, 
    831 F.2d 225
    , 227, 228 (11th
    Cir. 1987) (holding “an attorney seeking to quash a subpoena must assert
    the attorney-client privilege on a document-by-document basis” and
    reversing district court order quashing grand jury subpoena); In re Grand
    Jury Investigation, 
    431 F. Supp. 2d 584
    , 592 (E.D. Va. 2006) (“In the
    present circumstances, however, Roe’s motion fails; the assertion of the
    [marital] privilege is premature and cannot, in this case, serve as a basis
    to quash the subpoena. Rather, John Doe must appear and testify, but
    may assert the privilege in response to specific questions.”); In re Grand
    Jury Subpoenas Dated March 24, 2003, 
    265 F. Supp. 2d 321
    , 322, 334
    (S.D.N.Y. 2003) (protecting attorney–client privilege and work product on
    a question-by-question and document-by-document basis “between and
    among a prospective defendant in a criminal case, her lawyers, and a
    public relations firm hired by the lawyers to aid in avoiding an
    indictment”); In re Grand Jury Matter, 
    147 F.R.D. 82
    , 87 (E.D. Pa. 1992)
    (holding expert consultant retained by target’s law firm could not withhold
    certain documents claimed to be protected by the work-product doctrine);
    Losavio v. Dist. Ct., 
    533 P.2d 32
    , 36 (Colo. 1975) (en banc) (“[A]n attorney-
    witness must, except in the most exceptional of circumstances, honor a
    properly issued subpoena by appearing before the grand jury. It is then
    for the trial court to determine whether a specific interrogatory posed by
    the grand jury or the district attorney calls for an answer which falls within
    or without the privilege . . . .”); In re Grand Jury Subpoenas Duces Tecum,
    
    574 A.2d 449
    , 457 (N.J. Super. Ct. App. Div. 1989) (“[I]n contrast to a
    35
    subpoena duces tecum, a blanket motion to quash a subpoena ad
    testificandum is extremely inadvisable. Instead, the attorney should be
    called upon to appear and assert the attorney-client privilege after hearing
    the question or questions addressed to him.” (Citation omitted.)); Beach v.
    Shanley, 
    465 N.E.2d 304
    , 307 (N.Y. 1984) (“To the extent that a subpoena
    seeks testimony, the assertion that the contemplated testimony is subject
    to a privilege will not usually justify quashing the subpoena. In that event,
    litigation must await such time as when the witness refuses to answer the
    question on the ground that privileged information is concerned and an
    attempt is made to compel a response.” (Citations omitted.)); Movants to
    Quash Grand Jury Subpoenas v. Powers, 
    839 P.2d 655
    , 657 (Okla. 1992)
    (“We hold that assuming, but without deciding, that while such a First
    Amendment privilege may come into existence under particular facts, it
    does not authorize the quashing of these grand jury subpoenas.           The
    presiding judge of the grand jury has the power to rule on any claimed
    privilege on which the petitioners desire to rely when the privilege is
    invoked.”).
    Given the substantial authority supporting the action of the district
    court, I cannot conclude the district court’s ruling on the motion to quash
    was beyond the pale of reasonable justification under the circumstances
    presented so long as the witness is allowed to invoke the work-product
    protection in response to specific questions. With this understanding, I
    would thus affirm the ruling of the district court in all respects.