Diaz-Alarcon v. Flandez-Marcel ( 2019 )


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  •           United States Court of Appeals
    For the First Circuit
    No. 19-1150
    ALEJANDRO A. DÍAZ-ALARCÓN,
    Petitioner, Appellant,
    v.
    MICHELLE S. FLÁNDEZ-MARCEL,
    Respondent, Appellee.
    APPEAL FROM THE UNITED STATES DISTRICT COURT
    FOR THE DISTRICT OF PUERTO RICO
    [Hon. Carmen Consuelo Cerezo, U.S. District Judge]
    Before
    Thompson, Kayatta, and Barron,
    Circuit Judges.
    Maricarmen Carrillo-Justiniano for appellant.
    Steven P. Lausell Recurt, with whom Rafael E. Rodríguez Rivera
    and Legal Aid Clinic, Community Law Office, Inc., Inter-American
    University of Puerto Rico were on brief, for appellee.
    November 27, 2019
    THOMPSON, Circuit Judge.         It is not every day that a
    child-custody fight ends up in federal court.               But here we are.
    Invoking the Hague Convention on the Civil Aspects of International
    Child Abduction ("Convention"), see Oct. 25, 1980, T.I.A.S. No.
    11,670, 1343 U.N.T.S. 89, reprinted in 51 Fed. Reg. 10494-01 (Mar.
    26, 1986), and its implementing statute, the International Child
    Abduction    Remedies    Act    ("ICARA"),   see   22    U.S.C.   §§    9001-11,
    Alejandro Díaz-Alarcón seeks return of his daughter from the United
    States to Chile. To protect her privacy, we will call the daughter
    "ADF."    Opposing Díaz-Alarcón is ADF's mother, Michelle Flández-
    Marcel.   A federal district judge denied Díaz-Alarcón's petition.
    He appeals.       We affirm.
    Setting the Stage
    Legal Basics
    Over one hundred countries — including the United States
    and Chile — are contracting parties to the Convention.                 See Status
    Table,    HCCH,     https://www.hcch.net/en/instruments/conventions/status-
    table/?cid=24 (last visited Nov. 26, 2019).             Broadly speaking, the
    Convention aims to deter parents from abducting their children to
    a country whose courts might side with them in a custody battle.
    See Darín v. Olivero-Huffman, 
    746 F.3d 1
    , 7 (1st Cir. 2014); see
    generally Mozes v. Mozes, 
    239 F.3d 1067
    , 1069 (9th Cir. 2001)
    (noting     that    "[d]espite    the   image   conjured     by   words     like
    - 2 -
    'abduction' and 'force,' the Convention was not drafted in response
    to any concern about violent kidnappings by strangers" — instead,
    "[i]t was aimed . . . at the unilateral removal or retention of
    children by parents, guardians or close family members" (some
    quotation marks omitted)).1           A federal statute — ICARA — implements
    the Convention by (among other things) allowing a                     parent to
    petition a federal or state court to return an abducted child to
    the   child's        country   of   habitual    residence.      See   22   U.S.C.
    § 9003(b).         To prevail, the party seeking relief must establish by
    a preponderance of the evidence that the abductor "wrongfully
    removed       or   retained    [the   child]    within   the   meaning     of   the
    Convention."2        
    Id. § 9003(e)(1).
    A petition-receiving court may not decide who should
    have custody, however.          See 
    Darín, 746 F.3d at 8
    ; see also Walsh
    v. Walsh, 
    221 F.3d 204
    , 218 (1st Cir. 2000) (noting that because
    "[c]ourts are not to engage in a custody determination," it matters
    not "who is the better parent in the long run") (second quotation
    quoting Núñez-Escudero v. Tice-Menley, 
    58 F.3d 374
    , 377 (8th Cir.
    1995)).        And with narrow exceptions, the court must return the
    child to her country of habitual residence so that the courts of
    1
    "The Convention," however, "cease[s] to apply when the child
    attains the age of 16 years." Convention, art. 4.
    2   "Preponderance of the evidence" means "more likely true than
    not."       See United States v. Marino, 
    833 F.3d 1
    , 8 (1st Cir. 2016).
    - 3 -
    that country can decide.         See 
    Darín, 746 F.3d at 8
    (recognizing
    that "the Convention establishes a strong presumption in favor of
    returning a wrongfully removed or retained child").
    As for the exceptions, we mention only two.             The first
    is that a petition-receiving court need not order a return if
    "there is a grave risk that . . . return would expose the child to
    physical or psychological harm or otherwise place the child in an
    intolerable situation," see Convention, art. 13(b)3 — and it's
    important to keep in mind (for reasons that will become clear later
    on) that when the alleged type of risk is "sexual abuse of a young
    child,"    the   "policy   of   this    country    in   enforcing   the   .   . .
    Convention . . . is to view sexual abuse as an intolerable
    situation."      See Danaipour v. McLarey, 
    286 F.3d 1
    , 14-15 (1st Cir.
    2002) (from now on, Danaipour I).4             The second is that a petition-
    receiving court need not order a return if "the child objects to
    3 "'[G]rave' means a more than serious risk, but it need not
    be an immediate risk."    Charalambous v. Charalambous, 
    627 F.3d 462
    , 467 (1st Cir. 2010).
    4   For anyone wondering:
    [T]he Convention assigns the task of making the "grave
    risk" determination to the court of the receiving
    country; here, this task includes the obligation to make
    any subsidiary factual findings needed to determine the
    nature and extent of any risk asserted as a defense to
    returning the child. The [Convention] does not give the
    courts of the country of habitual residence jurisdiction
    to answer the grave risk question.
    
    Id. at 15.
                                           - 4 -
    being returned and has attained an age and degree of maturity at
    which it is appropriate to take account of [his or her] views."
    See Convention, art. 13.
    So as not to diminish the Convention's policy against
    unsavory     forum   shopping,    courts    construe   these    exceptions
    narrowly, see Nicolson v. Pappalardo, 
    605 F.3d 100
    , 105 (1st Cir.
    2010) — plus all facts supporting the grave-risk exception must be
    proved     "by   clear   and   convincing   evidence,"5   and   all   facts
    supporting the child-objection exception must be proved "by a
    preponderance of the evidence."         See 22 U.S.C. § 9003(e)(2)(A),
    (B).
    The Abduction6
    Díaz-Alarcón and Flández-Marcel are Chilean nationals.
    Flández-Marcel gave birth to their daughter, ADF, in 2008, in
    Santiago, Chile.     Díaz-Alarcón and Flández-Marcel married in 2009,
    separated in 2011, and divorced in 2014. They agreed that Flández-
    Marcel would have patria potestad (meaning "parental power") over
    5
    "Clear and convincing evidence" means "highly probable,"
    see Colorado v. New Mexico, 
    467 U.S. 310
    , 316 (1984), or
    "reasonably certain," see Evidence:         Clear and Convincing
    Evidence, Black's Law Dictionary 674 (10th ed. 2014). It falls
    between preponderance of the evidence and proof beyond a reasonable
    doubt. See Addington v. Texas, 
    441 U.S. 418
    , 425 (1979).
    6
    The relevant facts are not terribly complicated and are in
    part stipulated.
    - 5 -
    ADF, but that    Díaz-Alarcón would have a "direct and regular
    relationship" with ADF through scheduled visits.
    Rewind to 2011, after Díaz-Alarcón and Flández-Marcel
    had separated.   Flández-Marcel met and began dating Héctor Pérez-
    Babilonia, a Puerto Rico resident. ADF eventually started spending
    time with Pérez-Babilonia.    And in 2013 Díaz-Alarcón overheard ADF
    call Pérez-Babilonia "dad."    Díaz-Alarcón, in his own words, "told
    [ADF] off," explaining that Pérez-Babilonia "wasn't her dad."
    A few months later, Flández-Marcel had ADF evaluated by
    a child psychologist.     And ADF got diagnosed with a possible
    "[a]djustment [d]isorder."    The staff there also interviewed Díaz-
    Alarcón, Flández-Marcel, and Pérez-Babilonia.     Díaz-Alarcón said
    that both he and Flández-Marcel had verbally and psychologically
    abused each other.   Flández-Marcel, for her part, accused Díaz-
    Alarcón of psychologically abusing her.     After the interviews, a
    social worker concluded that ADF had
    [a]lienation [s]yndrome, which describes the change that
    occurs when there are conflictive marital break ups, in
    which the children censure, criticize or reject one of
    their parents in an unjustified and/or exaggerated
    manner. This implies that one parent systematically and
    consciously programmes the children to denigrate the
    other.
    Another social worker said that "it was demonstrated" that Díaz-
    Alarcón had not "mistreat[ed]" ADF, though adding that "it was
    demonstrated that the parents handled the family dynamic badly,
    - 6 -
    often being prone to including the girl in conflicts between
    [them]."
    Fast forward to 2014, a couple of weeks after Díaz-
    Alarcón and Flández-Marcel got divorced.    Flández-Marcel asked the
    authorities in Santiago to issue a protective order for ADF and
    her against Díaz-Alarcón, accusing him of having committed the
    crime of "threatening with no aggravating circumstances against
    persons" (excess capitalization omitted).    The authorities issued
    the protective order, telling the police to give "priority status"
    to calls from Flández-Marcel and to "periodic[ally] patrol[]" her
    neighborhood.    But they eventually closed the matter after the
    investigation unearthed no "information required to continue the
    case."
    A few months later, in 2015, just before she married
    Pérez-Babilonia, Flández-Marcel asked a Chilean family court for
    permission to move to Puerto Rico for one year with ADF.     In her
    petition, Flández-Marcel claimed that Díaz-Alarcón could not "be
    located."   After somehow learning about the petition, Díaz-Alarcón
    formally opposed Flández-Marcel's request in papers filed with the
    court, saying she knew where he was and accusing her of being an
    unfit mother.    The Chilean court then ordered Flández-Marcel to
    undergo a psycho-social evaluation, focusing on her parenting
    - 7 -
    skills.     A social worker interviewed ADF as part of the process.
    And ADF told her that Díaz-Alarcón
    is a fighter[;] he always hits with a closed fist. I've
    seen it. If I say something to him, he hits me. If I
    ask him a question, he hits me. If I ask him if we can
    go to the park, he hits me. That's how he was taught;
    violently. His mum and dad told me. Some other days he
    does not hit.
    Asked by the social worker "to think of some positive aspects of
    her dad," ADF said that Díaz-Alarcón is "a happy and loving person"
    who "gives kisses" and "affection." But she added that he "doesn't
    listen" when she tells him "he shouldn't hit [her] anymore."
    After reviewing the evaluation, the Chilean court pushed
    Díaz-Alarcón and Flández-Marcel to reach an agreement.     And they
    eventually did, agreeing, for example, that Flández-Marcel could
    take ADF to Puerto Rico from December 26, 2015 to March 26, 2016
    and that Díaz-Alarcón would have "constant communication" with ADF
    as well as "additional days of visits" when she returned to Chile.
    The Chilean court entered the agreement as a final and enforceable
    judgment.
    According to Díaz-Alarcón, Flández-Marcel and ADF were
    supposed to fly to Puerto Rico on December 26.      But because the
    two did not have return tickets, they could not board the plane.
    So they flew out on December 27 instead.
    Once there, Flández-Marcel enrolled ADF in school for
    the semester starting in January 2016.    Early in January, ADF had
    - 8 -
    a Skype call with Díaz-Alarcón.      Flández-Marcel was present too.
    ADF told Díaz-Alarcón that she never wanted to speak with him
    again.   He asked her why.   And she, according to Flández-Marcel,
    just screamed, "Cut, cut, cut."      So Flández-Marcel cut the call
    short.
    Flández-Marcel repeatedly asked ADF what was going on.
    According to Flández-Marcel, at first ADF would not say.     But one
    day — after learning that Flández-Marcel was pregnant — ADF started
    hitting her and then screamed, "Don't bathe me, don't bathe me,
    don't bathe me."    "Who is going to bathe you?" Pérez-Babilonia
    asked.   "Don't ask me," ADF said.
    At some point (apparently in January or February 2016),
    ADF told Flández-Marcel and Pérez-Babilonia the following — at
    least according to Flández-Marcel's expert witness, Dr. Carol
    Romey:   During a visit to his home when she was 5, Díaz-Alarcón
    had her take off her clothes to take a bath.        He took off his
    clothes too, got into the tub, touched her "private parts," and
    (per Pérez-Babilonia) had her touch his.     She then saw a "white-
    yellow liquid come out of his penis."     After, he beat her "with a
    slipper[] many times all over," walked "to the kitchen," and made
    her "something to eat."7
    7 We will have more to say about this incident — on which so
    much depends — later in this opinion.
    - 9 -
    According to Díaz-Alarcón's expert witness, Dr. Judith
    Mercado-Colón, a social worker at ADF's school recommended that
    ADF undergo a psychological evaluation "because of emotional abuse
    by her father."    The evaluation happened.      But if an evaluation
    report exists, no one has told us where in the record we might
    find it.8
    The deadline for ADF's return to Chile — March 26, 2016
    — came and went without her showing up.   And she remains in Puerto
    Rico to this very day.
    Díaz-Alarcón's Petition
    Convinced that Flández-Marcel had wrongfully retained
    ADF in violation of his custody rights, Díaz-Alarcón petitioned
    Puerto Rico's federal district court under the Convention and
    ICARA, seeking ADF's return.      Hoping to defeat Díaz-Alarcón's
    petition, Flández-Marcel raised the grave-risk and child-objection
    defenses.   The district judge referred the matter to a magistrate
    8 And because "[j]udges are not like pigs, hunting for
    truffles" hidden in the record, we have no have no obligation to
    look for it. See Rodríguez-Machado v. Shinseki, 
    700 F.3d 48
    , 50
    (1st Cir. 2012) (per curiam) (alteration in original) (citation
    and quotation marks omitted).
    - 10 -
    judge for an evidentiary hearing and a recommendation.              See 28
    U.S.C. § 636(b)(1)(B).
    The Magistrate Judge's Recommendation
    At the hearing, the magistrate judge heard testimony
    from       Flández-Marcel,   Dr.   Romey   (Flández-Marcel's   expert,   who
    submitted a report), Díaz-Alarcón, and Dr. Mercado-Colón (Díaz-
    Alarcón's expert, who submitted a report as well).         The magistrate
    judge also interviewed ADF (now aged ten) in chambers.9          Following
    the close of evidence and the filing of post-hearing memos, the
    magistrate judge issued a report and recommendation that reasoned
    this way.
    On the grave-risk issue, the "critical question" being
    whether Díaz-Alarcón "sexually abused" ADF, the magistrate judge
    said        that   Dr.   Romey     (Flández-Marcel's   expert)   testified
    "convincingly . . . that [ADF] had suffered serious trauma and now
    suffers PTSD and anxiety."10 Dr. Romey, the magistrate judge added,
    9    Helpfully and commendably, the parties stipulated that
    Chile was [ADF's] country of habitual residence before
    [Flández-Marcel] removed her to Puerto Rico; the removal
    breached [Díaz-Alarcón's] custody rights under Chilean
    law; [Díaz-Alarcón] was exercising his custody rights
    when [Flández-Marcel] removed [ADF] to Puerto Rico;
    [ADF] was not sixteen years old; and Chile and the United
    States are both contracting states to the . . .
    Convention.
    10
    PTSD is short for post-traumatic stress disorder.                See
    Danaipour 
    I, 286 F.3d at 10
    .
    - 11 -
    also found that ADF's relationship with Díaz-Alarcón is the only
    "trigger" for her "PTSD and anxiety" and that "she would be at
    grave risk of a psychotic break if she were to be placed under
    [his] care . . . until she can process her experiences."    But in
    the magistrate judge's telling, Dr. Romey's "purpose . . . was to
    . . . assess[] . . . [ADF's] maturity" and current "psychological
    state," and so did "not speak directly to whether [Díaz-Alarcón]
    sexually abused [ADF]."   Dr. Mercado-Colón (Díaz-Alarcón's expert)
    did "speak directly to that issue," the magistrate judge wrote.
    And having assessed ADF, Dr. Mercado-Colón "concluded that there
    was a suspicion of sexual abuse, just not by [Díaz-Alarcón]," given
    some "incongruences" in ADF's statements about the incident.11
    Ultimately, the magistrate judge said that while ADF "may be a
    victim of sexual abuse, a preponderance of the evidence does not
    show that [Díaz-Alarcón] abused her."
    On the child-objection issue, the magistrate judge said
    that ADF "clearly objected to returning to Chile."     Summarizing
    his in-chambers interview with ADF, the magistrate judge said that
    she knows the difference between telling the truth and telling a
    lie; is "intelligent and mature," having "a good understanding of
    the decision facing her and specific reasons for her . . .
    11We will touch on the "incongruences" stuff in next part of
    this opinion (discussing the district judge's decision).
    - 12 -
    opinion";12 and had not been "coached when she conveyed that she
    wanted to stay in Puerto Rico" — "she did not appear to be unduly
    influenced by the wishes of others such that her answers did not
    change even after [the magistrate judge] impressed upon her the
    importance of telling the truth." And, the magistrate judge found,
    Dr. Romey's report and testimony — e.g., that she has a "level of
    maturity clinically sufficient to be able to express her concerns
    and wishes in a reasoned and coherent manner" — supported these
    conclusions.
    Based on his findings, the magistrate judge recommended
    that the district judge deny Díaz-Alarcón's petition because (in
    his opinion), while Flández-Marcel cannot show "by clear and
    convincing evidence that [ADF] would be at grave risk if returned
    to Chile," she can show "by a preponderance of the evidence that
    [ADF] is sufficiently mature to object to returning to Chile" and
    that she did so object.
    12Staying with that topic, we think that another quote from
    the magistrate judge deserves repeating here:
    Importantly, [ADF] had positive and negative things to
    say about her life both in Chile and Puerto Rico, which
    showed that it was not a black-and-white decision but
    rather one that she had weighed and considered. Her
    [mentioning] positive memories of Chile, including her
    favorite teacher and the beaches, shows a maturity in
    thought as she decided that those positive memories
    were outweighed by the negative.
    - 13 -
    The District Judge's Decision
    Both sides objected to the magistrate judge's report and
    recommendation.     See 28 U.S.C. § 636(b)(1)(C); Fed. R. Civ. P.
    72(b)(2). Giving the issues fresh-eyed "de novo review," see Mercy
    Hosp., Inc. v. Mass. Nurses Ass'n, 
    429 F.3d 338
    , 343 (1st Cir.
    2005), the district judge studied the materials and conducted her
    own in-chambers interview of ADF. And the judge made the following
    findings and rulings (the district judge addressed the issues in
    an order different from the magistrate judge).
    On the child-objection issue, the district judge adopted
    the magistrate judge's recommendation that Flández-Marcel proved
    by a preponderance of the evidence that ADF "is sufficiently mature
    to object to returning to Chile and that [she] does object to
    returning." Still, the district judge noted that the fate of Díaz-
    Alarcón's petition pivoted "primarily" on Flández-Marcel's defense
    that ADF's "return to Chile would expose her to physical or
    psychological harm or would otherwise place her in an intolerable
    situation."
    On the grave-risk issue, the district judge highlighted
    how the magistrate judge never asked ADF to go into the details of
    the sexual abuse.    Quoting the magistrate judge's interview with
    ADF, the district judge noted that after the magistrate judge asked
    her to explain what she thought about whether she wanted "to go
    - 14 -
    back to Chile" or "stay in Puerto Rico," she replied, "[if] I go
    to Chile he, if he [Díaz-Alarcón] finds out that I returned . . . ,
    maybe he will come get me and he is going to do the same things he
    did   before."     The   district   judge    then   pointed   out   that   the
    magistrate judge later told her that "I know what you are talking
    about.      So I am not going to make you tell me the whole story
    again."      When ADF "referred to 'the same things he (the father)
    did before,'" the district judge concluded, "she was clearly
    referring to sexual abuse."13
    The district judge also disagreed with the magistrate
    judge's suggestion that Dr. Romey did not speak to the sexual-
    abuse allegation against Díaz-Alarcón. Dr. Romey, the judge wrote,
    testified that Díaz-Alarcón's "presence" "would place [ADF] at
    great risk of a psychotic break."            And, the district judge then
    wrote, "when asked about which experiences caused this extreme
    anxiety and stress to [ADF], Dr. Romey described in detail the
    event narrated by [her] when her father went naked into the
    bathtub, touched her private parts, masturbated and ejaculated."
    The district judge also noted that Dr. Romey saw "no
    clinical indicators of exaggeration or unreliable reporting on
    [ADF's] part." And the district judge indicated that ADF's "verbal
    13   The district judge added the "(the father)" parenthetical.
    - 15 -
    statements" to Drs. Romey and Mercado-Colón and to the judge
    herself were more notable for their commonalities than their
    differences — the "common elements" being her saying that when she
    was five or six, Díaz-Alarcón "told her she had to take a bath";
    he took "his clothes off and go[t] into the bathtub with her"; he
    "touched her private parts while both were in the bathtub"; and
    "[s]he saw a yellow/white, thick liquid coming out of his penis."
    Dr. Mercado-Colón, the district judge noted, saw some
    "inconsistencies" in the parties' accounts.           One example:      Dr.
    Mercado-Colón testified that "it . . . appears from the statements
    of   the   interviews"   that   ADF   told   Flández-Marcel    and   Pérez-
    Babilonia that Díaz-Alarcón "bathe[d] her and forced her to bathe"
    — but, according to Dr. Mercado-Colón, ADF told her (Dr. Mercado-
    Colón) that Flández-Marcel and Díaz-Alarcón "did not bathe her
    ever since she was a little girl."      Another example:      Dr. Mercado-
    Colón testified that Pérez-Babilonia reported that ADF disclosed
    that Díaz-Alarcón "touch[ed] [her] all [over] her body" — but, per
    Dr. Mercado-Colón, ADF "only mentioned the genital area" to her
    (Dr. Mercado-Colón).     Last example:       Dr. Mercado-Colón testified
    that Pérez-Babilonia said that ADF stated that Díaz-Alarcón "asked
    her [ADF] to touch him [Díaz-Alarcón]" — but, again according to
    Dr. Mercado-Colón, ADF's "statements" do not indicate that Díaz-
    Alarcón "asked her [ADF] to touch his [Díaz-Alarcón's] penis."
    - 16 -
    Yet the district judge found that every time Dr. Mercado-
    Colón "revisited the subject of the sexual abuse, [ADF] would
    provide the same details" — including "that her father touched her
    private parts, that she was in the bathtub, and he went into the
    bathtub naked, that a liquid came out of his penis that was yellow
    and sticky."   And the district judge emphasized that "[t]hroughout
    the several interview sessions and the repeated questioning by Dr.
    Mercado[-Colón],   [ADF]   remained   steadfast   that   it   was   [Díaz-
    Alarcón] who sexually abused her at his home."
    Noting how "vivid[]" her memory of her interview with
    ADF was, the district judge later expressly found that ADF "had no
    doubt of who was her wrongdoer."      "The who, what, when, and where
    of this event [were] reported by [ADF] in the same manner to Dr.
    Romey and [me]," the judge wrote.     And having canvassed the record
    and considered the parties' arguments, the judge "conclud[ed],
    without hesitation after assessing [ADF's] demeanor during the
    entire interview in chambers, that her statement of sexual abuse
    by [Díaz-Alarcón] is credible."       To quote again from the judge's
    rescript, "[w]hat [ADF] described in the language of a child were
    the acts of masturbation and ejaculation by her father after
    touching her vagina" — a description that was "credible, honest
    and heartfelt." So, the judge ruled, clear and convincing evidence
    - 17 -
    established that ADF faces a grave risk of harm if sent back to
    Chile.
    And   with    that,   the   district    judge   dismissed   Díaz-
    Alarcón's petition, precipitating this appeal.14
    Standard of Review
    In deciding cases like this, we "must" remember to
    let district courts do what district courts do best —
    make factual findings — and steel ourselves to respect
    what they find.    While we review transcripts for a
    living, they listen to witnesses for a living. While we
    largely read briefs for a living, they assess the
    credibility of parties and witnesses for a living.
    Taglieri v. Monasky, 
    907 F.3d 404
    , 408 (6th Cir. 2018); see also
    Cumpiano v. Banco Santander P.R., 
    902 F.2d 148
    , 152 (1st Cir.
    1990).      And   given   "the    unchallenged     superiority   of   [their]
    factfinding ability," see Salve Regina College v. Russell, 
    499 U.S. 225
    , 233 (1991), we review their factfinding only for "clear
    error," see 
    Darín, 746 F.3d at 8
    .
    But showing clear error — which Díaz-Alarcón must do to
    prevail — is no easy task.        See, e.g., United States v. Cates, 
    897 F.3d 349
    , 352 (1st Cir. 2018) (calling clear error's "heights . . .
    difficult to scale").       It is not enough that a finding strikes us
    as possibly or even probably wrong.          See Toye v. O'Donnell (In re
    O'Donnell), 
    728 F.3d 41
    , 45 (1st Cir. 2013).                Rather, to quote
    14   We will note additional details as needed.
    - 18 -
    ourselves quoting the Seventh Circuit, the finding must be "wrong
    with the force of a 5 week old, unrefrigerated, dead fish."    See
    
    id. at 46
    (emphasis added) (quoting S Indus., Inc. v. Centra 2000,
    Inc., 
    249 F.3d 625
    , 627 (7th Cir. 2001)).   Or, to quote ourselves
    quoting the Supreme Court, we must be left "with the definite and
    firm conviction" that the finding is "a mistake."       See United
    States v. Nygren, 
    933 F.3d 76
    , 82 (1st Cir. 2019) (emphasis added)
    (quoting United States v. U.S. Gypsum Co., 
    333 U.S. 364
    , 395
    (1948)).
    So the judge's choice between competing, but rational,
    views cannot be clearly erroneous.   See, e.g., Anderson v. City of
    Bessemer City, 
    470 U.S. 564
    , 573-74 (1985). And plausible findings
    based on witness credibility "can virtually never be clear error."
    
    Id. at 575.
       All of which means that we cannot stamp findings
    clearly erroneous just because we might have decided the matter
    differently.   See, e.g., Reich v. Newspapers of New Eng., Inc., 
    44 F.3d 1060
    , 1080 (1st Cir. 1995) (relying on 
    Anderson, 470 U.S. at 574
    ).
    To complete the picture, while we review the judge's
    factual findings for clear error, we determine de novo whether she
    interpreted and applied the Convention correctly.       See, e.g.,
    Neergaard-Colón v. Neergaard, 
    752 F.3d 526
    , 530 (1st Cir. 2014).
    - 19 -
    Arguments and Analysis
    Díaz-Alarcón challenges the district judge's grave-risk
    and child-objection conclusions.     We can begin —    and end — with
    his grave-risk contentions, aware (to echo a point voiced by
    Danaipour I) that
    [t]he policy under the Convention of . . . the United
    States government . . . is weighted towards protection
    of the child when there is credible evidence of sexual
    abuse, particularly when the child is so young and when
    the allegations involve abuse by a parent. This policy
    informs the grave risk 
    analysis. 286 F.3d at 16
    .
    Díaz-Alarcón's first set of arguments is directed at the
    district     judge's   handling    of   the      magistrate   judge's
    recommendations — to no avail, Flández-Marcel argues; and we agree
    with her.
    For example, Díaz-Alarcón essentially claims that the
    district judge erred by not seconding the magistrate judge's
    recommendation to accept Dr. Mercado-Colón 's no-sexual-abuse-by-
    Díaz-Alarcón conclusion.      Insisting that "Dr. Mercado[-Colón]
    testified that [ADF] would not be in grave risk to suffer harm if
    return[ed]," he also implies that the district judge had no choice
    but to find as the magistrate judge did.        But as Flández-Marcel
    points out, the problem for Díaz-Alarcón is that the district judge
    was legally empowered to "accept, reject, or modify, in whole or
    in part, the [magistrate judge's] findings or recommendations,"
    - 20 -
    see 28 U.S.C. § 636(b)(1); and she was legally required to "make
    a de novo determination of those portions of the [magistrate
    judge's] report or specified proposed findings or recommendations
    to which objection is made," see 
    id. To be
    fair, the evidence
    certainly points in conflicting directions in spots.     Yet Díaz-
    Alarcón cannot meet his burden of showing clear error merely by
    pointing to competing testimony.    See 
    Anderson, 470 U.S. at 573
    -
    74; see also United States v. Flete-Garcia, 
    925 F.3d 17
    , 26 (1st
    Cir. 2019) (explaining that if there are two permissible views of
    the evidence, "a [district] court's choice between those two
    competing [views] cannot be clearly erroneous").    And ultimately,
    the evidence that the district judge highlighted — which included
    statements by ADF that she found "credible, honest and heartfelt"
    — lend the kind of strength necessary for her grave-risk findings
    to pass clear-error inspection.    See 
    Anderson, 470 U.S. at 575
    .
    Trying to undercut the plausibility of ADF's interview
    statements, Díaz-Alarcón says in the grave-risk section of his
    brief that Flández-Marcel "employ[ed] undue influence."     But he
    does not seriously develop his single-sentence suggestion — for
    instance, he does not adequately explain why the district judge
    clearly erred in finding (based on her personal observation of
    ADF) that ADF's statements were "honest and heartfelt," a finding
    that runs counter to his undue-influence intimation.         So we
    - 21 -
    consider the suggestion waived.        See, e.g., United States v.
    Zannino, 
    895 F.2d 1
    , 17 (1st Cir. 1990) (admonishing that "issues
    adverted to in a perfunctory manner, unaccompanied by some effort
    at developed argumentation, are deemed waived").
    Wait a minute, says Díaz-Alarcón.     Caselaw holds that
    "absent special circumstances, a district judge may not reject the
    credibility determination of a magistrate judge without first
    hearing the testimony" herself.   See United States v. Hernández-
    Rodríguez, 
    443 F.3d 138
    , 148 (1st Cir. 2006).     And, his argument
    continues, the district judge here flouted this rule by rejecting
    the magistrate judge's "credibility determination" of Dr. Mercado-
    Colón "without hearing [her] live testimony."     But we agree with
    Flández-Marcel that the district judge committed no such error.
    And that is because — in responding to Díaz-Alarcón's motion for
    a free transcript — the district judge stated in no uncertain terms
    that she "did not reject any credibility determination(s) made by
    the Magistrate-Judge concerning [Dr. Mercado-Colón's] findings."15
    15 28 U.S.C. § 753(f) pertinently provides that a party
    requesting a free transcript must show "that the appeal is not
    frivolous (but presents a substantial question)." In his motion,
    Díaz-Alarcón argued (among other things) that his credibility-
    rejection argument was nonfrivolous. Because he "imputed, without
    basis, that the [district judge] rejected determinations of
    credibility by the Magistrate-Judge regarding testimony that was
    dispositive of the grave risk of harm defense," and because no
    other "substantial questions are presented on appeal," the judge
    denied his motion.
    - 22 -
    Instead, she simply considered Dr. Mercado-Colón's findings in the
    context of all the evidence — i.e., she kicked around each bit of
    "'evidence submitted to the Magistrate-Judge,'" including "the
    personal interview of the minor in chambers and the testimonies of
    the parents" — in ruling that Flández-Marcel had established the
    grave-risk defense.
    Díaz-Alarcón also implies that the district judge had to
    follow the magistrate judge's lead and side with Dr. Mercado-Colón
    over Dr. Romey, because Dr. Romey relied on "a narration of events
    made . . . to be used in this judicial proceeding."        But he
    provides no on-point authority for why that matters. See generally
    Town of Norwood v. FERC, 
    202 F.3d 392
    , 405 (1st Cir. 2000)
    (emphasizing that "developing a sustained argument out of . . .
    legal precedents" is a litigant's job, not ours). Anyway, it seems
    clear to us that Dr. Mercado-Colón did the same thing.     And so
    either way, this aspect of    Díaz-Alarcón's argument is not a
    difference-maker.
    Nor is Díaz-Alarcón's assertion that the district judge
    had to accept the magistrate judge's recommendation because "Dr.
    Mercado[-Colón] was the only expert in forensic sexual abuse
    evaluation."   After all, Danaipour I makes clear that sometimes
    trial judges can "find that sexual abuse did or did not occur
    without the benefit of a full forensic evaluation."   See 286 F.3d
    - 23 -
    at 19 n.14.     And Díaz-Alarcón has not persuasively explained why
    this is not one of those times.
    Díaz-Alarcón's next set of arguments takes aim at the
    district judge's interview of ADF — again to no avail, Flández-
    Marcel says; and again we agree with her.
    For starters, Díaz-Alarcón complains that the district
    judge "call[ed] [ADF] for an interview in private . . . on the
    sexual abuse allegation" — an interview that he says lacked
    "guarantees of trustworthiness."             But he gives us no indication
    that   he    objected    to   the   chambers-interview     procedure.        See
    generally Reyes-García v. Rodríguez & Del Valle, Inc., 
    82 F.3d 11
    ,
    14 (1st Cir. 1996) (noting that an appellant pushing an argument
    on appeal must show us that he "seasonably advanced and properly
    preserved [it] in the lower court").           Nor does he develop here any
    critique of that procedure beyond arguing that the sex-abuse
    questioning was unrelated to the ADF's objection to returning to
    Chile — an argument that falls on its own weight.             So we deem any
    challenge on this score waived, see 
    Zannino, 895 F.2d at 17
    ,
    without     offering    any   opinion   on    the   procedure's   adequacy   or
    fairness.
    Repeating his just-rejected argument (that the district
    judge had to accept the magistrate judge's view of the record),
    Díaz-Alarcón contends that the district judge's "consideration of
    - 24 -
    new evidence" — i.e., the district judge's interview of ADF —
    amounts    to   "an   abuse   of   discretion"    in   "this   case."     This
    contention does not move the needle, however, because the law
    allowed her to "receive further evidence" as she decided de novo
    whether to "accept, reject, or modify" the magistrate judge's
    proposed findings or legal conclusions. See 28 U.S.C. § 636(b)(1);
    see also Fed. R. Civ. P. 72(b)(3).
    Moving on, Díaz-Alarcón writes that the district judge
    could have ordered ADF back to Chile without putting her in harm's
    way by imposing "undertakings" — i.e., enforceable conditions on
    her return designed to keep her safe.            See Danaipour 
    I, 286 F.3d at 21-23
    ; see also Danaipour v. McLarey, 
    386 F.3d 289
    , 302-03 (1st
    Cir. 2004) (hereinafter, Danaipour II).             Separating permissible
    undertakings     from   impermissible     ones    is    complicated     stuff,
    however.    See Danaipour 
    I, 286 F.3d at 21-23
    .          There are concerns
    for "international comity" — an American court, for example, should
    do nothing that "would smack of coercion of the foreign court."
    
    Id. at 23-24;
    see also 
    id. at 22
    (discussing the need to "avoid
    the unseemliness of a U.S. court issuing orders for a foreign court
    to enforce, and the foreign court's possible noncompliance").             And
    there are concerns about "the appropriateness of undertakings when
    the abducting parent claims to be protecting the child from abuse,"
    
    id. at 22
    — some "authority," for instance, "indicat[es] that
    - 25 -
    undertakings should be used more sparingly when there is evidence
    that the abducting parent is attempting to protect the child from
    abuse," 
    id. at 25;
    see also Danaipour 
    II, 386 F.3d at 293
    (holding
    that a district court's supportable finding that a child's return
    "would cause grave harm" makes "immaterial" petitioner's claim
    that the courts in the child's country of habitual residence "could
    take ameliorative actions to prevent further harm," adding that
    "[i]n    such    circumstances,         [the    Convention]     does    not    require
    separate consideration either of undertakings or of steps which
    might    be     taken    by    the     courts   of    the   country     of    habitual
    residence").         Díaz-Alarcón        has    the   burden    of    proof    on   the
    undertakings issue.           See Danaipour 
    I, 286 F.3d at 21
    , 26.             But he
    deals with none of these complexities.                  Which is not the way to
    turn    the   tide      in   his    favor,   since    failing   to     give   "serious
    treatment [to] a complex issue . . . is not adequate to preserve
    the claim on appeal."              See Tayag v. Lahey Clinic Hosp., Inc., 
    632 F.3d 788
    , 792 (1st Cir. 2011).
    Díaz-Alarcón hinges his last set of arguments on caselaw
    indicating that a district judge "has discretion to order return
    even where such return poses a grave risk of harm or threatens to
    place the child in an intolerable situation."                        See Lozano v.
    Montoya Alvarez, 
    572 U.S. 1
    , 21 (2014) (Alito, J., concurring)
    (quotation marks omitted); see also Mauvais v. Herisse, 772 F.3d
    - 26 -
    6, 11 (1st Cir. 2014).    As he sees it, the district judge "abused
    [her] discretion by not giving sufficient weight[,] if any," to
    Flández-Marcel's "inequitable conduct" (e.g., "conceal[ing]" ADF
    from him and "undu[ly] influenc[ing]" her), to ADF's "interests"
    (e.g.,   Flández-Marcel    "disrupt[ed]     the    strong   and   stable
    relationships [ADF] had in Chile"), and to the Convention's "aims
    and objectives." Like Flández-Marcel, we see no reason to reverse.
    Consider Díaz-Alarcón's contention that the district
    judge had no "awareness of [her] responsibility to weigh[] the
    relevant factors."     He played up these factors below, however.
    And the district judge said that she considered the "evidence
    presented."    "While a fuller explanation might have been helpful,"
    we know "that the absence of a more detailed explanation does not
    amount to an abuse of discretion."      See Yaman v. Yaman, 
    730 F.3d 1
    , 22 (1st Cir. 2013).    As for the rest of his argument, his real
    complaint is essentially that the district judge should have given
    controlling weight to the interests that cut in favor of return.
    But "[s]uch relative weighting of interests by the district court
    . . . is not for [us] to second-guess, and especially not on an
    abuse of discretion analysis."    See 
    id. Time for
    a summary.     An appellant's odds of winning a
    clear-error challenge are not very good.          See, e.g., 
    Cates, 897 F.3d at 352
    .    This is especially so here, given how the district
    - 27 -
    judge was uniquely situated to gauge ADF's credibility. See, e.g.,
    United States v. McGregor, 
    650 F.3d 813
    , 820 (1st Cir. 2011).
    Sure,    maybe     the   district    judge    could   have   made    different
    credibility findings or weighed the evidence differently.                 But
    that    does    not   make   her   at-issue   findings   clearly    erroneous.
    Ultimately, because none of Díaz-Alarcón's arguments leaves us
    with a "definite or firm conviction" that the district judge made
    "a mistake" or, more odoriferously, convinces us that she was
    "wrong with the force of a 5 week old, unrefrigerated, dead fish,"
    see 
    Toye, 728 F.3d at 46
    , we cannot reverse her on the grave-risk
    issue — even if we would have reached a different a conclusion,
    see 
    Anderson, 470 U.S. at 573
    .          And given this ruling, we have no
    need to decide the child-objection issue.
    Final Words
    For the reasons recorded above, we affirm the judgment
    entered below.        No costs to either party.
    - 28 -