United States v. William Vazquez-Rivera ( 2011 )


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  •            United States Court of Appeals
    For the First Circuit
    No. 10-1930
    UNITED STATES OF AMERICA,
    Appellee,
    v.
    WILLIAM VÁZQUEZ-RIVERA,
    Defendant-Appellant.
    APPEAL FROM THE UNITED STATES DISTRICT COURT
    FOR THE DISTRICT OF PUERTO RICO
    [Hon. José A. Fusté, U.S. District Judge]
    Before
    Torruella, Boudin, and Dyk,*
    Circuit Judges.
    Martin G. Weinberg, with whom Kimberly Homan, were on brief
    for appellant.
    Jenifer Y. Hernández-Vega, Assistant United States Attorney,
    with whom Rosa Emilia Rodríguez-Vélez, United States Attorney,
    Nelson Pérez-Sosa, Assistant United States Attorney, Chief,
    Appellate Division, and Thomas F. Klumper, Assistant United States
    Attorney, were on brief for appellee.
    December 22, 2011
    *
    Of the Federal Circuit, sitting by designation.
    TORRUELLA,    Circuit   Judge.       William    Vázquez-Rivera
    ("Vázquez") was charged with (1) possession of child pornography in
    violation    of 18   U.S.C.   §   2252(a)(4)(B),    (2)    three   counts   of
    transportation of child pornography via computer in interstate
    and/or foreign commerce in violation of 18 U.S.C. § 2252(a)(1), and
    (3) two counts related to use of the internet in order to transfer
    obscene matters to an individual the appellant knowingly believed
    to be under the age of sixteen in violation of 18 U.S.C. § 1470.1
    On February 12, 2010, a jury found Vázquez guilty of all counts
    against him.      Vázquez now appeals his conviction mainly on the
    grounds that the government's conduct and use of improper testimony
    at trial warrant the reversal of his conviction.               In addition,
    Vázquez claims that the district court erroneously refused to admit
    parts   of   an   investigative   form     memorializing    portions   of   an
    interview with his son that he alleges contained exculpatory
    evidence.     Vázquez also argues that the prosecution made improper
    remarks during its opening statement and closing argument that
    constituted prejudicial plain error.          We agree with Vázquez that
    the prosecution's case against him at trial extensively relied on
    improper testimony.       Accordingly, we reverse and vacate Vázquez's
    conviction.
    1
    The indictment against Vázquez also included a forfeiture
    allegation under 18 U.S.C. § 2253.
    -2-
    I.   Background and Procedural History
    In   April    2008,    Agents   of    the   Federal   Bureau   of
    Investigation ("FBI") began an operation in which they went online
    posing   as    a   Puerto    Rican    fourteen-year-old     girl.     Entering
    LatinChat.com, a Spanish speaking chatroom, Special Agent Edward
    Cabral ("Agent Cabral") and Special Agent Christine Segarra ("Agent
    Segarra") went undercover using the screen name "Patsychula14."2
    Agent Cabral served in an advisory role, while Agent Segarra
    assumed the Patsychula14 identity.                 On April 16, 2008, Agent
    Segarra was online as Patsychula14 when an individual using the
    screen name "IncestoPR" initiated an online conversation with her.
    IncestoPR inquired about her age -- which Agent Segarra said was
    fourteen -- and chatted about subjects including incest and sexual
    relationships between adults and minors. IncestoPR eventually gave
    Patsychula14 his email address, bienhotpr@hotmail.com,3 and the
    chat continued on MSN Messenger, an instant messaging program, with
    IncestoPR now communicating with the screen name "Secreto."4
    2
    The screen name is a combination of "Patsy," the online
    persona's nickname, the word "chula," which translates to English
    as "sexy" or "cute," and "Patsy's" age -- i.e., fourteen.
    3
    "Bienhotpr" may be translated as "'very' hot pr," with "pr"
    being a likely reference to Puerto Rico.
    4
    "IncestoPR" translates from Spanish as "IncestPR," with "PR"
    again being a likely reference to Puerto Rico.      In Spanish,
    "Secreto" means "Secret."
    -3-
    Over    the    course      of    the   next   three   months,   Secreto
    initiated eight chat sessions with Patsychula14. Secreto discussed
    sexual   themes    and    sent   Patsychula14       pictures     depicting   child
    pornography.      During a messaging session on June 5, 2008, Secreto
    also sent Patsychula14 a webcam video of a man masturbating, which
    Secreto said was himself.          In the video, Agent Segarra and Agent
    Cabral were able to see a man wearing red flannel pajamas, his
    hands and genitalia, and part of the room in the background.
    However, the agents were not able to see the man's face.
    In a final chat session on July 2, 2008, Patsychula14
    asked Secreto if he resided in Camuy, Puerto Rico, which Secreto
    then acknowledged. Agent Segarra also asked if Secreto's real name
    was "William," to which Secreto responded "no . . . José."                 Secreto
    then ceased all communication.
    As part of its investigation, the FBI issued a subpoena
    to   Microsoft    in     order   to    obtain     the    subscriber   information
    corresponding     to     the   bienhotpr@hotmail.com         email    address   and
    associated internet protocol ("IP") address.5                    Armed with the
    relevant IP address, agents subpoenaed Liberty Cable, the address's
    owner, requesting additional subscriber and account information.
    5
    "An IP address is the unique address assigned to every machine
    on the internet. An IP address consists of four numbers separated
    by dots, e.g., 166.132.78.215." In re Pharmatrak, Inc., 
    329 F.3d 9
    , 13 n.1 (1st Cir. 2003).
    -4-
    This subpoena yielded Vázquez's name and an address in Camuy,
    Puerto Rico.
    On August 22, 2008, FBI agents -- including Agent Cabral
    and Agent     Segarra   --    executed   a   search   warrant    on    Vázquez's
    residence.6       When the agents arrived, Vázquez answered the door
    wearing red pajamas which testimony at trial suggested were similar
    to   those    Agent   Cabral    and     Agent   Segarra   observed       in    the
    masturbation webcam video Secreto had sent Patsychula14.                      Tile
    found in the residence and a chair and filing cabinet found in
    Vázquez's office also were similar to those Agent Cabral and Agent
    Segarra observed in the webcam video.
    Computers seized at Vázquez's residence contained over
    one-hundred images of child pornography –- including the two sent
    to Patsychula14 –- as well as cartoons relating to incest found in
    password-protected subdirectories labeled "William."                    Forensic
    analysis     of   Vázquez's   primary    desktop   computer     showed    memory
    relating to screen names "Secreto" and "IncestoPR."                   Two images
    found on Vázquez's computer also matched two profile pictures used
    during the chats.
    Based on this information, a grand jury returned an
    indictment charging Vázquez with the above-referenced six counts.
    6
    This was the second search warrant that the government executed
    in connection with this investigation. A few days earlier, FBI
    agents executed a search warrant on a residence they mistakenly
    identified as belonging to Vázquez.
    -5-
    Vázquez pled not guilty and a five-day jury trial was held in
    February 2010.    Agent Cabral and Agent Segarra both testified as
    two of the government's five witnesses.   Opening the government's
    case against Vázquez, Agent Cabral described the steps taken in the
    investigation.    The government then called Microsoft and Liberty
    Cable custodians, who testified on the subscriber information and
    company records the government used to obtain a search warrant for
    Vázquez's residence.     As the fourth government witness, Agent
    Segarra then described the online sting operation in greater detail
    and read transcripts of several chats she had with the individual
    using the Secreto and IncestoPR screen names.        As the final
    government witness, Agent Hesz Rivera, the FBI forensic examiner
    who reviewed the seized computers, offered testimony regarding his
    findings.    Among other evidence, the jury was allowed to see the
    online conversations between Agent Segarra and Secreto, relevant
    child pornography images, and the webcam video of the masturbation
    incident.
    The defense focused its efforts on trying to show that
    the prosecution could not conclusively link Vázquez to the chats
    and contended that the government could not prove Vázquez knew the
    home computers contained child pornography.   On direct, Vázquez's
    wife offered testimony explaining that all four family members
    -6-
    residing in the home had access to the seized computers,7 including
    the desktop computer containing the pictures sent to Patsychula14.
    Vázquez's wife also testified that a housekeeper had keys to the
    residence and that her children and her grandchildren -- including
    a nineteen-year-old male named Mario and two older adult males
    named José and Luis -- could access the home, even in the family's
    absence.   During cross-examination of Agent Cabral, counsel also
    presented evidence that various IP addresses were used to access
    the email account used to communicate with the Patsychula14 decoy,
    one of them registered to an owner by the name of José Acevedo.
    Agent Cabral testified that the government did not investigate
    these addresses.
    On February 12, 2010, the jury returned a verdict finding
    Vázquez guilty as to all counts of the indictment.      This timely
    appeal followed.
    II.   Discussion
    Vázquez challenges his conviction on several grounds.
    Vázquez's primary contention is that the district court erred when
    it admitted much of Agent Segarra's testimony, which Vázquez
    alleges was improper, and impermissible opinion regarding his
    guilt. Vázquez also contends that the district court erred when it
    did not admit portions of an FBI form related to an interview with
    7
    Vázquez resided with his wife, his sixteen-year-old son, and his
    ten-year-old daughter.
    -7-
    Vázquez's son. Finally, Vázquez claims that statements made during
    the prosecution's opening and closing remarks were improper and
    amounted to plain error.          Because we agree with Vázquez that a
    troublingly large amount of Agent Segarra's testimony was improper,
    we reverse on those grounds and do not find it necessary to address
    his other claims.       As we must, we consider the facts in the light
    most favorable to the verdict.           United States v. Stevens, 
    640 F.3d 48
    , 49 (1st Cir. 2011).
    A.   Improper Overview Testimony
    Vázquez argues, based on several of our recent cases,
    that   much    of   Agent   Segarra's     testimony    amounted   to   improper
    overview testimony.         See, e.g., United States v. Meises, 
    645 F.3d 5
    (1st Cir. 2011); United States v. Flores-de-Jesús, 
    569 F.3d 8
    (1st     Cir. 2009); United States v. Casas, 
    356 F.3d 104
    (1st Cir.
    2004).      The     problematic   form    of   this   testimony   consists   of
    declarations by a witness -- commonly a law enforcement officer
    involved in the investigation at issue -- presented early during
    trial to describe the government's general theory of the case. See
    
    Meises, 645 F.3d at 14
    n.13 (noting such evidence "often provides
    an anticipatory summary of the prosecution's case by previewing the
    testimony of other witnesses").           We have denounced the use of this
    kind of testimony "in which a government witness testifies about
    the results of a criminal investigation, usually including aspects
    of the investigation the witness did not participate in, before the
    -8-
    government has presented evidence." United States v. Rosado-Pérez,
    
    605 F.3d 48
    , 55 (1st Cir. 2010).   In doing so, we have noted that
    the problems inherent in such testimony are patently clear "if the
    evidence promised by the overview witness never materializes," but
    have warned that even if the substance of the witness's preview is
    later corroborated during trial, the overview testimony of a law
    enforcement agent still represents a problematic "endorsement of
    the veracity of the testimony that will follow."   
    Flores-de-Jesús, 569 F.3d at 18
    ; see also 
    id. at 17-19
    (discussing this "imprimatur
    problem" at length).8
    While our decision today in no way detracts from our
    prior admonishments regarding overview testimony, we believe that
    8
    Our cases have not, however, foreclosed the use of overviews
    entirely.   Subject to the overarching precept that lay witness
    testimony should be grounded on personal knowledge, we have
    acknowledged "[t]here may be value in having a case agent describe
    the course of his investigation in order to set the stage for the
    testimony to come . . . ." 
    Flores-de-Jesús, 569 F.3d at 19
    . We
    have also recognized that "if properly limited to constructing the
    sequence of events in [an] investigation," an agent's testimony
    "could be valuable to provide background information and to explain
    how and why the agents even came to be involved with the particular
    defendant." 
    Id. (citations and
    quotation marks omitted). Finally,
    our cases have also recognized that the complexity of a given case
    may play a role in helping to determine whether such descriptive
    testimony is appropriate.      
    Id. (citing case
    involving money
    laundering and tax evasion charges to note "we have explicitly
    distinguished between the kind of 'overview' testimony that we
    [have criticized]" and an IRS agent's testimony proffered as a
    "'description   of   his  investigation'    into  the   defendant's
    activities, which [was] based on personal knowledge" (citing United
    States v. Hall, 
    434 F.3d 42
    , 57 (1st Cir. 2006))); see also 
    Hall, 434 F.3d at 57
    ("summary testimony" introduced towards the end of
    trial "permissible to summarize complex aspects of a case").
    -9-
    the trial declarations at issue here can be distinguished from the
    ones we considered problematic in those cases.           In the instant
    case, Agent Segarra took the stand as the government's penultimate
    witness on the first day of a five-day trial and, as such, did not
    "preview" the government's case.         See United States v. Hall, 
    434 F.3d 42
    , 56-57 (1st Cir. 2006) (noting appellant's reliance on
    cases discussing overview testimony "misplaced" where testimony in
    question proffered "near the end of the government's case-in-
    chief").   However, as we now explain, we still find that much of
    Agent Segarra's testimony bore distinct and serious deficiencies
    and should not have reached the jury.
    B.   Agent Segarra's Improper Testimony
    Vázquez   challenges   six     specific   portions   of   Agent
    Segarra's testimony.      Where counsel properly objected to and
    preserved testimony for appellate review, we usually review for
    abuse of discretion.    
    Hall, 434 F.3d at 56-57
    .       However, because
    defense counsel did not object to, or otherwise failed to preserve,
    much of the testimony on which Vázquez now bases his appeal, we
    review most of the challenged portions of Agent Segarra's testimony
    only for plain error.     United States v. Flemmi, 
    402 F.3d 79
    , 86
    (1st Cir. 2005).     Where we review for plain error, we ascertain
    whether "(1) an error occurred (2) which was clear or obvious and
    which not only (3) affected [] substantial rights, but also (4)
    seriously impaired the fairness, integrity, or public reputation of
    -10-
    judicial proceedings."             
    Id. (quoting United
    States v. Duarte, 
    246 F.3d 56
    , 60 (1st Cir. 2001) (alterations omitted)).
    1.    Initial Identification Testimony
    Shortly after Agent Segarra took the stand during the
    first day of trial, the prosecution asked her, with regards to the
    investigation, whom the investigation identified as the individual
    using the screen name "IncestoPR."                Agent Segarra responded:           "We
    ended up identifying him as William Vazquez Rivera."                              At the
    prosecution's request, Agent Segarra proceeded to describe the
    conversations        that    she    had   with    IncestoPR     while    posing     as a
    fourteen-year-old girl using the screen name Patsychula14.
    Although the defense did not object to these statements
    at trial, Vázquez now claims that this testimony was admitted in
    error.   We agree.         By identifying Vázquez as IncestoPR, the person
    who "approached" Agent Segarra's online avatar and continued to
    chat   with    her       using   the   Secreto     screen      name,    Agent    Segarra
    addressed the ultimate issue before the jury: whether the conduct
    the government observed on its end of the computer screen could be
    imputed to Vázquez.          Because the government agents conducting the
    investigation that led to Vázquez's arrest did not directly observe
    the individual chatting with Agent Segarra, Vázquez's fate depended
    on   whether       the   government       could   prove   to    the    jury     beyond   a
    reasonable doubt that the evidence it had against him -- most of
    -11-
    which was circumstantial in nature9 -- placed him at the other end
    of these online conversations.    While ultimate issue opinions are
    not always prohibited, lay testimony of this nature must comport
    with the requirement that proffered testimony be helpful to the
    jury.   See Fed. R. Evid. 701(b); see also United States v. García,
    
    413 F.3d 201
    , 214 (2d Cir. 2005) ("If such broadly based opinion
    testimony as to culpability were admissible under Rule 701, 'there
    would be no need for the trial jury to review personally any
    evidence at all.'" (quoting United States v. Grinage, 
    390 F.3d 746
    ,
    750 (2d Cir. 2004)).    On these facts, we are compelled to reaffirm
    our warning that lay opinions going to the ultimate issue will
    rarely meet this requirement, "since the jury's opinion is as good
    as the witness's."     United States v. Sanabria, 
    645 F.3d 5
    05, 516
    (1st Cir. 2011)(quoting Mitroff v. Xomox Corp., 
    797 F.2d 271
    , 276
    (6th Cir. 1986)).
    Agent Segarra's testimony was also improper because her
    statements were based in large part on the overall investigation
    rather than her personal observations.      See Fed. R. Evid. 602,
    701(a); see also 
    Rosado-Pérez, 605 F.3d at 55
    (noting "basic
    principle in the Federal Rules of Evidence that witnesses, other
    9
    At oral argument, the government correctly acknowledged that the
    only piece of direct evidence introduced in the prosecution's case
    against Vázquez came when Agent Segarra testified about what she
    observed in the webcam video of the masturbation incident. As we
    explain below, however, while portions of this testimony were
    proper, we find that much of it amounted to improper identification
    evidence not grounded in personal knowledge.
    -12-
    than experts giving expert opinions, should testify from personal
    knowledge").       Despite being closely involved in all aspects of the
    underlying investigation, Agent Segarra never personally observed
    Vázquez chatting on the seized computers on the mentioned dates,
    nor, for example, was her testimony based on surveillance of the
    premises that would place Vázquez inside the residence with the
    computer at the time the chats occurred.                  Cf. 
    Rosado-Pérez, 605 F.3d at 55
    -56 (concluding testimony proper where investigator
    witness "went to [drug point] at least fifty times; and repeatedly
    participated       in     video    and     personal      surveillance,      wiretap
    surveillance, and controlled drug buys").
    The    only    opportunity      Agent   Segarra    had   to   directly
    observe conduct at issue in Vázquez's trial came during the chat
    she   had   with    Secreto   on    June    5,   2008.      During   that   online
    conversation, Agent Segarra was able to observe the webcam video
    that Secreto sent and discerned an adult male masturbating.
    According to her later testimony, however, Agent Segarra was only
    able to see the man's hands and genitals, as well as the red
    pajamas he wore and parts of the room in the background.                     At no
    point did Agent Segarra see the man's face, hear the man speak, or
    otherwise observe distinguishing marks on the man's body.10                   Even
    10
    At trial, the prosecution requested and received permission to
    photograph Vázquez's "genital area and hands" for the purpose of
    comparing any resulting pictures with the webcam video of the
    masturbation incident. For reasons the record does not reveal, the
    prosecution opted not to use these images.
    -13-
    if that limited opportunity for personal observation would support
    an identification of Vázquez as the individual in the video, her
    purported identification was largely based on other evidence that
    could   not    support     such   an   identification       based   on    personal
    knowledge. Here, we cannot say that Agent Segarra's identification
    testimony was "rationally based on the witness's perception" as the
    evidentiary rules command.         Fed. R. Evid. 701(a).
    We   pause   to   highlight     a   related   concern      that   will
    unfortunately surface again in our discussion infra. In responding
    to the prosecutor's questions in the manner she did -- i.e., "we
    ended up identifying [the subject] as William Vazquez Rivera" --
    Agent Segarra implied that her comments expressed the combined
    opinion of both her and other unidentified officers, based on the
    totality of similarly-unidentified information gathered over the
    course of the investigation, that the defendant on trial was the
    person who sent the illicit material and was therefore guilty.                   We
    stress our disapproval of such testimony at trial and agree with
    the Second Circuit, writing in United States v. García, that:
    [W]hen an agent relies on the "entirety" or
    "totality" of information gathered in an
    investigation to offer a "lay opinion" as to a
    person's culpable role in a charged crime, he
    is not presenting the jury with the unique
    insights    of    [a    witness's]    personal
    perceptions. Thus, in such circumstances, the
    investigatory results reviewed by the agent --
    if admissible -- can only be presented to the
    jury for it to reach its own conclusion.
    -14-
    
    413 F.3d 201
    , 212 (2d Cir. 2005) (internal citation omitted).   The
    situation is all the more worrisome where, as here, an agent's
    testimony appears to at least partly rest on the collective insight
    of other unknown investigators who may not themselves be present at
    trial.   While such a composite perspective is permissible in other
    non-trial contexts,11 those circumstances are not delimited by the
    trial-applicable Rule 701 requirement that lay opinion be based on
    personal perceptions.12   See 
    id. at 213;
    see also United States v.
    Dukagjini, 
    326 F.3d 45
    , 54 (2d Cir. 2003) ("As the testimony of [a]
    case agent moves . . . to providing an overall conclusion of
    criminal conduct, the process tends to more closely resemble the
    11
    See, e.g., United States v. Lamela, 
    942 F.2d 100
    , 104 n.5 (1st
    Cir. 1991) (noting it is common in grand jury context for
    government "to present an overview of the criminal investigation
    through the testimony of the case agent, rather than through the
    testimony of [] investigating officers").
    12
    Referring to Agent Segarra's repeated use of the plural "we"
    when speaking about the government's investigation and its results,
    the government concedes that Agent Segarra "could have used a
    better term."    Nevertheless, the government posits that Agent
    Segarra's articulation in the plural was proper, as it accounted
    for the fact that Agent Segarra conducted the investigation in
    conjunction with Agent Cabral, who had already testified as a
    government witness.    While plausible, the government's ex-post-
    facto rationalization of Agent Segarra's use of the plural form is
    unavailing. If Agent Segarra meant to allude to Agent Cabral or
    his views in her testimony, this should have been made clear at
    trial. Neither here nor in the exchanges we examine below did the
    questioning Assistant U.S. Attorney seek to clarify this point
    before the jury. Thus, when Agent Segarra represented that "we
    concluded 'X'," she invoked the opinions of an unknown number of
    additional agents without explaining what those opinions were or,
    for that matter, whether they were grounded on personal perceptions
    or on evidence before the jury.
    -15-
    grand jury practice, improper at trial, of a single agent simply
    summarizing an investigation by other that is not part of the
    record.").
    2.    Identification Testimony on Second Day of Trial
    During the course of the first and second days of trial,
    Agent Segarra described the chats that she, posing as Patsychula14,
    had with the individual using the screen name Secreto on the MSN
    Messenger platform.          Agent Segarra's testimony during the second
    day of trial focused on conversations she had with Secreto over the
    course of several days during the spring of 2008.               Reading from
    chat   transcripts      at    the   prosecution's   behest,    Agent   Segarra
    narrated conversations of a strong sexual nature in which Secreto
    repeatedly alluded to incest and sexual acts between adults and
    children, sent several images containing child pornography, and
    incited Patsychula14 to engage in sexual conversations over the
    phone.
    After Agent Segarra read to the jury the text of chats
    between Patsychula14 and the individual named Secreto on April 28,
    2008, May 20, 2008, May 22, 2008, May 27, 2008, and May 29, 2008,
    the prosecution sought to clarify that the person using the Secreto
    screen    name     on        MSN    Messenger     was   also    behind    the
    bienhotpr@hotmail.com email account and the IncestoPR screen name
    used in the LatinChat.com chat room.            At this point, the following
    exchange between the prosecutor and Agent Segarra took place:
    -16-
    Q: And just to make -- to clarify, IncestoPR
    is the same person as Secreto, correct?
    A: Correct.
    Q: And Secreto is the            same   person   at
    Bienhotpr@hotmail.com?
    A: Correct.
    Q: And throughout your investigation, who did
    you identify that person to be?
    . . . .
    A: We identified      him   as   William   Vazquez-
    Rivera.
    Counsel objected during this exchange on grounds that the
    question had already been answered several times, but the district
    court allowed the testimony, noting Agent Segarra could be cross-
    examined on these statements.   Because Vázquez now challenges this
    testimony on grounds that it was improper, we review for plain
    error. See United States v. Ríos-Hernández, 
    645 F.3d 456
    , 462 (1st
    Cir. 2011) (concluding appellant's "argument in the district court
    is sufficiently different from the one raised on appeal that the
    argument is forfeited and will be reviewed for plain error").
    This testimony should not have reached the jury.      Again,
    Agent Segarra's statements bear many of the deficiencies we have
    already discussed.      Firstly, Agent Segarra's declaration that
    Vázquez was identified as the person with whom she conversed as
    Patsychula14 "throughout the investigation" expressed conclusions
    about Vázquez's culpability, thus implicating the ultimate issue-
    -17-
    variety Rule 701 concerns noted above.          Second, Agent Segarra's
    testimony did not evince whether this identification was based on
    evidence or testimony before the jury and appeared to subsume the
    perceptions or insights of other agents into her testimony.               See
    
    Casas, 356 F.3d at 119
    .
    3.    Testimony Related to Webcam Incident
    During the second day of trial, Agent Segarra described
    another chat session between Patsychula14 and Secreto that took
    place on the morning of June 5, 2008.        It was during this chat that
    Secreto sent Patsychula14 an invite to view a webcam video.            Agent
    Segarra   testified   that    after    she    accepted   the     invite    as
    Patsychula14, she could observe an adult male masturbating.            Agent
    Segarra also testified that she could observe "a five-star chair
    and a floor. . . . part of a desk, a desk top drawer, and a file
    drawer" that were later identified when federal agents executed the
    search warrant on Vázquez's home.       This testimony was proper.
    The   prosecution   then    asked    Agent   Segarra   why   these
    observations were important.         Over the defense's objections on
    grounds that the importance of this testimony was the jury's
    province, Agent Segarra responded:
    It was very important, because it helped us
    identify that this is where William Vazquez –-
    this office where William Vazquez utilized
    [sic] to send the video and other child
    pornography    pictures    in    the    search
    warrant. . . .
    In the office we noticed there was a [sic]
    same chair, and we also compared the pictures
    -18-
    of the search warrant with the video . . . .
    And that also helped us identify William
    Vazquez-Rivera.
    The prosecution then showed the video.             Agent Segarra
    testified that in part of the video, it was possible to see an
    "individual [] wearing red flannel pajamas, which were exactly the
    same flannel pajamas that William Vazquez-Rivera was wearing the
    day   that   we   arrived   at   his   residence     to   conduct   the   search
    warrant."
    Because defense counsel did not object to this testimony
    on the Rule 701 and overview grounds it now raises on appeal, we
    review for plain error.          United States v. Capozzi, 
    486 F.3d 711
    ,
    718 (1st Cir. 2007).
    We conclude that this testimony was plainly improper.
    First, as before, Agent Segarra's testimony was not limited to
    opinion that soundly followed from her perceptions.             Second, Agent
    Segarra's    statement also       summarized   the    investigation       without
    indicating that her testimony was based on evidence before the
    jury.   Crucially, because the determination of whether Vázquez was
    the man in the webcam video could have been properly reached only
    by considering evidence available to the jury, Agent Segarra's
    testimony also usurped the jury's role instead of being helpful to
    it.   See 4 J. Weinstein & M. Berger, Weinstein's Federal Evidence
    § 701.05 (Joseph M. McLaughlin, ed., Matthew Bender 2d ed. 2011)
    (testimony, the "sole function" of which is "to answer the same
    -19-
    question     that    the    trier      of    fact   is    to    consider    in    its
    deliberations. . . . [m]ay be excluded as unhelpful").
    In its brief, the government highlights the fact that
    Agent Segarra was part of the group of agents that executed the
    search warrant on Vázquez's residence and observed Vázquez wearing
    "the same red flannel pajamas as in the masturbation incident."
    The government also notes that Agent Segarra was able to observe
    items and parts of Vázquez's residence that appeared similar to
    those   that     could     be   seen    in   the    video.       Based     on    these
    observations,       the    government        reasons     that    Agent     Segarra's
    identification statements were based on her personal knowledge.
    Here, the government misses the point.                 Even if Agent
    Segarra had some basis for personal observation, her testimony
    clearly    relied    heavily     on    the   overall     investigation      and    the
    conclusions reached by other agents.                 It was the prosecution's
    burden to lay a foundation that established the basis of Agent
    Segarra's knowledge or opinion in connection with all of her
    testimony.      See Fed. R. Evid. 602, 701; see also 
    Rosado-Pérez, 605 F.3d at 55
    ("A foundation should be laid establishing the basis of
    a   witness's    knowledge,      opinion,      or   expertise.").        While     the
    prosecution appears to have laid an acceptable foundation for Agent
    Segarra to testify about the steps taken in the investigation, the
    online chats she had with the individual using the screen names
    IncestoPR and Secreto, and the items, events, and clothing she
    -20-
    observed while she executed the search warrant on Vázquez's home,
    Agent Segarra's testimony as to Vázquez's identity, based on the
    investigation as a whole, was clearly improper.
    4.     Testimony Related to Seizure of Desktop Computer
    After Agent Segarra described the evidence collected at
    Vázquez's home, the prosecution inquired about the purpose of
    seizing Vázquez's desktop computer.           Agent Segarra stated that
    "[t]he purpose was to corroborate all the information that we
    previously had from all the chats, and all the information we had
    obtained from William Vazquez-Rivera."
    The prosecution then asked Agent Segarra if the seizure
    of Vázquez's desktop computer achieved the described purpose, to
    which the defense objected on hearsay grounds.            The trial judge
    overruled the defense's objection, and the prosecution was allowed
    to restate the question, now asking Agent Segarra whether, in her
    opinion, the purpose of the seizure had been achieved. Once again,
    the defense objected, now noting that Agent Segarra's opinion did
    not constitute admissible evidence.          At the court's behest, the
    prosecution rephrased its question and Agent Segarra testified that
    the government achieved the seizure's intended purpose, at least in
    part because forensic analysis of the seized computer yielded two
    of   the   child    pornography   images   transmitted   during   the   chat
    sessions.
    -21-
    To the extent Agent Segarra testified about the results
    of the government's forensic analysis on the seized computers, it
    appears she relied on information provided to her by FBI Agent and
    computer analyst Hesz Rivera and thus predicated her statements on
    hearsay.       However,    because      Agent   Rivera's   later     testimony
    corroborated Agent Segarra's statements regarding forensic analysis
    results, we conclude that any hearsay problem here was harmless
    under review for either plain error or abuse of discretion.                See
    United   States     v.   Piper,   
    298 F.3d 47
    ,   58   (1st    Cir.   2002)
    ("Cumulative evidence is typically regarded as harmless . . . .").
    5.   Later Identification Testimony Related to Webcam
    Video
    When Agent Segarra began to describe the video containing
    the masturbation incident to the jury, the prosecution asked her:
    "And throughout your investigation, do you identify who [the male
    in the video] was?"       Agent Segarra answered: "Yes.           We identified
    that person to be William Vazquez-Rivera."
    This testimony was admitted in error.            Without a doubt,
    it purports to present Agent Segarra's opinion regarding Vázquez's
    culpability based on the whole of the government's investigation
    and, by relying on the plural "we," improperly alludes to unnamed
    investigators' views without explaining what those were or whether
    they were based upon the record in evidence or these investigators'
    perceptions.      See 
    García, 413 F.3d at 211
    .
    -22-
    6.   Prosecution's Redirect Examination of Agent Segarra
    Lastly, Vázquez alleges that a substantial portion of
    Agent Segarra's testimony during redirect examination amounts to
    plain   error.        Specifically,    Vázquez   takes    issue       with   the
    prosecution's    questioning    regarding    each     online    chat    session
    mentioned   in   Agent   Segarra's     testimony.     This     back-and-forth
    between the prosecution and its witness went as follows:
    Q: Now, as of today, after having conducted
    the investigation, after having received all
    the information and having executed the search
    warrant, can you identify the person that you
    were chatting with on April 16 of 2008?
    A: Correct, with all the evidence we have
    gathered from the investigation, yes.
    Q: Who is that person?
    A: The person is William Vazquez-Rivera.
    Q: And on April 28, 2008.
    A: No.
    Q: Can you identify the          person    you     were
    chatting with as of today?
    A: Correct. If he is the holder of that IP
    address for Bienhotpr, yes, we could identify
    him back then.
    Q: And who is that?
    A: William Vazquez-Rivera.
    Q: And as of today, after gathering all the
    information and identifying the information,
    can you identify who you were chatting with on
    May 20, 2008?
    A: Yes.
    -23-
    Q: Who is that person?
    A: William Vazquez-Rivera.
    Q: And on May 22, 2008?
    A: Correct, William Vazquez-Rivera.
    Q: And May 27, 2008?
    A: Yes, William Vazquez-Rivera.
    Q: And May 29, 2008?
    A: Yes, William Vazquez-Rivera.
    Q: And May 30, 2008?
    A: Yes, William Vazquez-Rivera.
    Q: And on June 5, 2008?
    A: Yes, William Vazquez-Rivera.
    Q: And on that specific date, did you see any
    visual of William Vazquez-Rivera?
    A: Yes, I did.
    Q: What visual was that?
    A: I saw him masturbating via webcam, and we
    also saw the pajamas we were able to identify
    the day of the search warrant.
    Q: And on July 2nd, 2008, were you able to
    identify as of today who you were chatting
    with on that date?
    A: Yes, William Vazquez-Rivera.
    All   told,    during   this   exchange,    Agent   Segarra   mentioned   the
    defendant's name nine times, repeatedly identifying him as the
    -24-
    individual responsible for the offending conduct –- the primary
    issue disputed by Vázquez's defense at trial.
    This testimony is rife with the Rule 701-related dangers
    we have already discussed at length above and in other prior cases.
    Agent Segarra's statements here again run afoul of Rule 701's
    demand   that   lay   opinion   testimony   be   "helpful   to   a   clear
    understanding of the witness' testimony or the determination of a
    fact at issue."       Fed. R. Evid. 701(b).      We have explained that
    "[t]he nub of [Rule 701(b)'s] requirement is to exclude testimony
    where the witness is no better suited than the jury to make the
    judgment at issue, providing assurance against the admission of
    opinions which would merely tell the jury what result to reach."
    
    Meises, 645 F.3d at 16
    (internal citations and quotation marks
    omitted); see also Lynch v. City of Boston, 
    180 F.3d 1
    , 17 (1st
    Cir. 1999).     Moreover, as should be clear by now, Agent Segarra
    improperly relied on far more than her personal observations or
    evidence already before the jury.
    C.   Whether Improper Testimony Prejudiced Vázquez
    Having concluded that much of the challenged testimony
    constituted obvious error, we must now assess whether Vázquez can
    "surmount the high hurdle of plain error review and show that the
    improper remarks affected the outcome of the trial." United States
    v. (Feliciano)-Rodríguez, 
    525 F.3d 85
    , 96 (1st Cir. 2008).            This
    inquiry is "substantially similar" to the standard we follow in
    -25-
    harmless      error   analysis,       with    the    added        wrinkle   that   "the
    petitioner, not the government, 'bears the burden of persuasion
    with respect to prejudice.'"           Ramírez-Burgos v. United States, 
    313 F.3d 23
    , 29 (1st Cir. 2002) (quoting United States v. Olano, 
    507 U.S. 725
    , 734 (1993)).          Surveying the government's case against
    Vázquez, we must conclude that, in this case, wrongly-admitted
    testimony disturbed the appellant's substantial rights.
    Undercover     investigations         in    which    agents   posing   as
    minors "visit" a chat room or other online location where suspected
    child predators       convene       have    become    a    common    tool   to   detect
    individuals who would deign to engage in the reprehensible conduct
    that child pornography laws proscribe. See, e.g., United States v.
    Sims,   
    428 F.3d 945
    ,    950    (10th    Cir.       2005);    United   States   v.
    Chriswell, 
    401 F.3d 459
    , 460 (6th Cir. 2005); United States v.
    Cherian, 58 Fed. Appx. 596, *1 (5th Cir. 2003).                      Because much of
    the transgressive acts these investigations target are carried out
    in private while the offender sits at a computer terminal, even
    when agents are able to zero in on a suspect -- e.g., by matching
    an internet account on record or an IP address with an account
    holder's residential or physical address -- it may not always be
    clear that he or she is actually responsible for the conduct that
    agents observed on their screens.                 As the instant case suggests,
    when the subject of the investigation communicates at all times
    through an online alias or "screen name" and other persons have
    -26-
    access to the computer used to communicate with undercover law
    enforcement agents, it becomes all the more necessary for the
    investigation to collect evidence, direct or circumstantial, that
    will link the prohibited conduct to the defendant beyond a jury's
    reasonable doubt.
    Here, the issue of identification was everything at
    trial.     When the prosecution started its case against Vázquez it
    was beyond cavil that, hiding behind the screen names "Secreto" and
    "IncestoPR," someone discussed topics of a strong sexual nature
    with and sent images containing child pornography to Patsychula14,
    a decoy fourteen-year-old girl. It was similarly clear that during
    one of those chats, Secreto invited Agent Segarra, posing as
    Patsychula14, to view a webcam video depicting an adult male
    masturbating. What the prosecution had to prove to the jury beyond
    a reasonable doubt, however, was that the evidence the government
    collected    supported   its   theory   that   Vázquez   was   behind   this
    conduct.     Correspondingly, defense counsel undertook a strategy
    designed to cast a shadow of doubt over the prosecution's claim
    that Vázquez was culpable.       Prompted by counsel, Vázquez's wife
    testified that others -- including, notably, other adult males --
    had access to Vázquez's home and the seized computers during the
    period the chats took place.        Pressed on cross-examination, the
    agent supervising the investigation also acknowledged that the
    -27-
    government did not investigate several IP addresses from which the
    email account that corresponded with Patsychula14 was accessed.
    The jury was free to give these attempts to undermine the
    prosecution's case as much credit as it desired. Although the case
    against Vázquez was largely based on circumstantial evidence, the
    jury was also free to assign the evidence against him as much
    weight as it considered appropriate. See United States v. Gamache,
    
    156 F.3d 1
    , 8 (1st Cir. 1998) ("[C]ircumstantial evidence, if it
    meets   all    the    other   criteria   of   admissibility,   is    just   as
    appropriate as direct evidence and is entitled to be given whatever
    weight the jury deems it should be given . . . .").            Our concern,
    however, is that the prosecution's repeated and extensive use of
    improper testimony may have influenced the jury at the likely
    expense of Vázquez's efforts to mount an adequate defense. Because
    we do not find that the evidence against Vázquez was sufficiently
    compelling to assuage this concern, we conclude it is highly
    probable that the errors here affected the jury's verdict and find
    that they unfairly impaired the integrity of Vázquez's trial.
    III.     Conclusion
    For    the   foregoing     reasons,   we   vacate     Vázquez's
    conviction.
    Vacated.
    -28-