Abdullahi Ex Rel. Estate of Mohamed v. City of Madison ( 2005 )


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  •                           In the
    United States Court of Appeals
    For the Seventh Circuit
    ____________
    No. 04-4114
    HALIMA ABDULLAHI, on her own
    behalf and as Administrator for the
    Estate of JAMAL MOHAMED, Deceased,
    Plaintiff-Appellant,
    and ALI MOHAMED ABDI,
    whereabouts unknown,
    Involuntary Plaintiff-Appellant,
    v.
    CITY OF MADISON, SERGEANT PATRICK
    GRADY, OFFICER HERBERT MUELLER,
    OFFICER JESSICA MURPHY and CAPITOL
    POLICE OFFICER JAMES BROOKS,
    Defendants-Appellees.
    ____________
    Appeal from the United States District Court
    for the Western District of Wisconsin.
    No. 03-C-0631—Barbara B. Crabb, Chief Judge.
    ____________
    ARGUED JUNE 8, 2005—DECIDED SEPTEMBER 12, 2005
    ____________
    Before CUDAHY, EVANS and WILLIAMS, Circuit Judges.
    CUDAHY, Circuit Judge. Plaintiff Halima Abdullahi,
    mother of a man who died during (or shortly after) defen-
    2                                                  No. 04-4114
    dant police officers’ attempts to subdue and arrest him,
    brought a Fourth Amendment Claim against the City of
    Madison and the police officers involved, alleging that
    one of the officers used excessive force during the arrest and
    that the other officers failed to intervene. The district court
    granted defendants’ motion for summary judgment, ruling
    that there was no evidence that the officers engaged in any
    objectively unreasonable conduct. Plaintiff now appeals. For
    the reasons set forth here, we reverse and remand.
    I.   FACTUAL BACKGROUND & DISPOSITION
    BELOW1
    This case marks the tragic final chapter of a troubled life.
    Decedent Jamal Mohamed, the son of Somali immigrants,
    suffered from severe Post Traumatic Stress Disorder
    (PTSD) due to various traumatic experiences he endured as
    a child in his homeland. As a result, he was prone to having
    “episodes” of disorientation and erratic behavior. Mr.
    Mohamed was apparently having one of these episodes on
    the fateful afternoon of November 20, 2002.
    At approximately 1:18 p.m. on that day, nurse Pamela
    McCarty was in her Jeep on her way to work when she
    noticed the decedent staggering across three lanes of traffic
    on University Avenue in Madison, Wisconsin. She observed
    that he was breathing heavily and in apparent physical
    distress, and he stumbled and fell as he attempted to
    negotiate the curb. Ms. McCarty got out of her Jeep and
    attempted to assist Mohamed, at which point he attempted
    1
    These facts are taken principally from the district court’s
    Opinion and Order below, Abdullahi et al. v. City of Madison
    et al., 
    2004 WL 2535426
    , at *1-6 (Nov. 5, 2004, W.D.Wis.) (Un-
    published Opinion and Order). Most of the basic facts surrounding
    Mohamed’s encounter with the defendant police officers are not
    disputed.
    No. 04-4114                                                 3
    to climb into her Jeep, threw himself against the vehicle,
    ran back out into traffic, threw debris at her and then
    grabbed her hair and clawed at her uniform. McCarty
    attempted to free herself by hitting Mohamed in the head
    with her cell phone, and she ultimately succeeded after
    Mohamed had punched her once in the face.
    Meanwhile, defendant City of Madison Police Officer
    Jessica Murphy received dispatches reporting that a male
    was causing a disturbance in a tailor’s shop in the 2800
    block of University Avenue. As she was driving to Univer-
    sity Avenue, she received further dispatches alerting her to
    Mohamed’s altercation with McCarty by the roadside. When
    Murphy arrived at the scene of the altercation, she observed
    Mohamed lying on his back on the sidewalk near the curb.
    Fearing that Mohamed might need medical attention, she
    called for fire rescue. As Murphy approached, Mohamed sat
    up and began swinging his belt over his head by the buckle.
    Defendants Sergeant Patrick Grady and City of Madi-
    son Officer Herbert Mueller were also on patrol in the
    area when they heard the dispatches related to Mohamed.
    When they heard additional radio transmissions that
    Mohamed may have grabbed a pedestrian and was swinging
    a belt at officer Murphy, they sped to the scene on
    an emergency basis. Defendant State Capitol Officer James
    Brooks was also in the area. After seeing Murphy’s squad
    car speeding toward the scene with its siren activated,
    Brooks got into his squad car, turned on his scanner and
    headed in Murphy’s direction. While en route he heard a
    female officer say something to the effect of “he’s whipping
    his belt at me” and “step it up.”
    Shortly thereafter, Brooks and Grady arrived at the
    scene. They observed that Mohamed was flailing with his
    belt and making a guttural, growling noise. Brooks testified
    that, as he approached, Mohamed jumped up from his knees
    to a standing position, a move so “athletic” that it “shocked”
    4                                                No. 04-4114
    him. Defendants Grady, Murphy and Brooks them moved in
    to subdue Mohamed. Murphy grabbed one of Mohamed’s
    arms while Brooks and Grady grabbed the other. The three
    officers moved Mohamed up against the Jeep to gain control
    over him and then took him to the ground, onto his stom-
    ach. Brooks testified that it was the most “peaceful”
    takedown he had ever been a part of.
    Once on the ground, Mohamed began kicking his legs,
    moving his arms so they could not be handcuffed and
    arching his back upwards as if he were trying to escape.
    Grady attempted to control Mohamed’s legs, and Murphy,
    who was on Mohamed’s left, was able to cuff his left hand.
    At some point during the encounter, defendant officer
    Mueller arrived on the scene and grabbed Mohamed’s
    right thigh and ankle in an attempt to keep him under
    control. Defendant Brooks was on Mohamed’s right side,
    and he placed his right knee and shin on the back of
    Mohamed’s shoulder area and applied his weight to keep
    Mohamed from squirming or flailing. Brooks increased the
    pressure on Mohamed’s back until Mohamed stopped
    arching his back upward. Mohamed apparently stopped
    struggling about 15-20 seconds after Brooks began to
    apply his weight to Mohamed’s shoulder area, and Brooks
    was able to cuff Mohamed’s right wrist and connect the
    handcuffs to those that Murphy had applied on Mohamed’s
    left wrist. Brooks took his weight off Mohamed after the
    handcuffing was complete. In all, Brooks estimates that his
    knee and shin were on the back of Mohamed’s shoulder for
    approximately 30-45 seconds.
    Brooks testified that Mohamed was still breathing after
    the handcuffing was completed and Brooks had got off him.
    Grady, who was trying to maintain control of Mohamed’s
    legs, suggested that Mohamed’s legs be restrained. By this
    time, several other police officers had gathered at the scene,
    and one of them (Officer Morovic) ran to his squad car to
    retrieve a kickstop restraint. At some point during this
    No. 04-4114                                                        5
    sequence of events (the parties differ on this point) Officer
    Jerry Goehring walked up to the scene.2 Goehring did not
    observe any movement from Mohamed, and the defendant
    police officers all soon realized that Mohamed was not
    breathing. Mueller and Grady, who were still holding onto
    Mohamed’s legs, felt him go limp, and Brooks and Grady
    both said something to the effect that Mohamed was no
    longer breathing.
    Fire rescue workers had just arrived at the scene, and the
    police officers removed all restraints so that paramedics
    could initiate resuscitation efforts. Mohamed died at 2:39
    p.m., approximately two and a half minutes after the
    defendant officers had taken him to the ground.
    Plaintiff filed the present suit on November 10, 2003,
    alleging that Officer Brooks used excessive, deadly force
    to subdue her son Jamal Mohamed by kneeling on his
    back while he was lying prone on the ground, causing chest
    and neck trauma ultimately resulting in his death, in
    violation of the decedent’s Fourth Amendment rights. She
    also brought Fourth Amendment claims against the other
    defendant police officers—Murphy, Grady and
    Mueller—under 
    42 U.S.C. § 1983
    , alleging that they
    observed Brooks using an unreasonable level of force
    against Mohamed and failed to intervene.
    2
    Plaintiff insists that Goehring arrived prior to Morovic’s
    retrieval of the kickstop restraint, while the district court and
    the defendants maintain that Goehring arrived at the scene
    only after Morovic had begun to apply the kickstop. Plaintiff
    insists that Goehring’s testimony regarding the timing of his
    arrival creates inconsistencies in the officers’ collective testimony
    as to when Mohamed stopped breathing. But ultimately not much
    turns on this point since under either version of events
    it is undisputed that Brooks’ knee was already off Mohamed’s
    back when Goehring approached, and that Mohamed stopped
    breathing shortly after Brooks’ knee was removed.
    6                                               No. 04-4114
    Four different doctors provided medical testimony
    regarding the cause of Mohamed’s death. They all agree
    that Mohamed died of chest and neck trauma, including
    a collapsed left lung and injuries consistent with strangula-
    tion. They all observed that a tremendous amount of
    air had been forced into the tissue surrounding Mohamed’s
    lungs, as if his chest had been crushed or squashed. The
    medical experts differ as to their certainty about the
    exact cause or timing of these injuries.
    Dane County Coroner John Stanley officially listed the
    cause of death as “(a) Traumatic Asphyxia, (b) Truncal
    Emphysema/Tension; Pneumothorax [collapsed lung]/
    Laryngeal [neck area] hemorrhage, (c) Neck and Chest
    trauma.” (PRFF (Madison) at ¶ 78.) However, he was
    not able to explain the exact causes of the trauma, stat-
    ing that the origins of the collapsed lung and neck hem-
    orrhage remain an “unanswered question.” (Id. at ¶¶ 20-
    21.) Defendant Brook’s Expert, Dr. Robert W. Huntington
    III, who performed the initial autopsy on Mohamed,
    testified that he had never seen such a severe neck hemor-
    rhage before, and he was unable to determine the exact
    cause or timing of the injuries. He did say that Mohamed’s
    injuries were consistent with strangulation and “would
    strongly suggest force while he was alive,” though he said
    they presented a “real conundrum” since they were not
    explained by the defendant police officers’ accounts of their
    encounter with Mohamed. (PRFF at ¶ 43, S.J. Exh. K at 5.)
    Dr. Billy Bauman, hired by defendants Grady, Mueller and
    Murphy (the Madison city police officers), opined that
    Mohamed’s injuries did not occur during his struggle with
    the defendant police officers, though he concedes that the
    injuries could have been the result of blunt force trauma
    and might have been related to Brooks’ kneeling on
    Mohamed if Brooks had knelt on Mohamed’s neck. (PPFF
    at ¶¶ 60-62.)
    Finally, plaintiff’s medical expert, Dr. Howard Adelman,
    No. 04-4114                                                 7
    concurred that Mohamed died of trauma to the chest
    and neck, including a collapsed lung, and suffocation.
    He asserts that Mohamed’s injuries were caused by trauma
    or force inflicted upon the decedent while he was still alive.
    He noted that these types of injuries occur “when the chest
    is compressed by an external weight or force and is pre-
    vented from expanding,” creating a physiological chain of
    events “akin to drowning.” (Adelman Aff., S.J. Exh. G at
    18.) Dr. Adelman also concluded “to a high degree of
    medical probability and virtual certainty” that Mohamed’s
    injuries “occurred during the struggle with the police
    officers,” after he was already face-down on the ground. (Id.
    at 19.) Dr. Adelman reasons that Mohamed could not
    possibly have offered the resistance attributed to him by the
    defendants if he had been suffering from such traumatic
    injuries at the beginning of the encounter. Dr. Adelman also
    noted that the officers reported no visible injuries or
    difficulty breathing before taking Mohamed to the ground,
    and that his internal wounds were bloody and fresh when
    his body arrived in the coroner’s office for examination.
    Nurse McCarty and another civilian witness, Ms.
    Weinfurter, were standing near the scene of the incident
    (McCarty was standing 6-7 feet away), and they testi-
    fied that Mohamed acted aggressively and that the de-
    fendant police officers did not hit, strike or choke Mohamed,
    nor do anything that might have caused him serious injury.
    Following discovery, defendants moved for summary
    judgment and the district court granted this motion on
    November 4, 2005, ruling that plaintiff had adduced no
    evidence that Brooks had acted unreasonably under the
    circumstances, nor that he had caused the injuries to
    Mohamed’s neck and chest. The court noted the absence
    of any eyewitness testimony suggesting that the police
    acted violently or unreasonably, and the court asserted that
    the mere fact of an injury does not suffice to create
    a question of fact regarding excessive force. Abdullahi et al.
    8                                                No. 04-4114
    v. City of Madison et al., 
    2004 WL 2535426
     (Nov. 5, 2004,
    W.D.Wis.) (Unpublished Opinion and Order). Plaintiff’s
    appeal now comes before us.
    II. JURISDICTION
    The district court had jurisdiction over the plaintiff’s
    constitutional and section 1983 claims under 
    28 U.S.C. §§ 1331
     and 1343. The district court entered its judgment
    granting the defendants’ motion for summary judgment
    on November 9, 2004, and the plaintiff timely filed her
    notice of appeal on December 1, 2004. We now have juris-
    diction over the present appeal pursuant to 
    28 U.S.C. § 1291
    .
    III. DISCUSSION
    Plaintiff advances two claims here: (1) that defendant
    Brooks used excessive force in subduing Mohamed and (2)
    that the remaining defendants failed to intervene to stop or
    prevent the application of excessive force. Though legally
    distinct, the fate of plaintiff’s failure to intervene claim is
    closely linked to that of her excessive force claim since, by
    definition, if there was no excessive force then there can be
    no failure to intervene.
    A. Excessive Force
    Under prevailing Supreme Court precedent, “all claims
    that law enforcement officers have used excessive
    force—deadly or not—in the course of an arrest, investiga-
    tory stop, or other ‘seizure’ of a free citizen should be
    analyzed under the Fourth Amendment and its ‘reasonable-
    ness’ standard.” Graham v. Connor, 
    490 U.S. 386
    , 395
    No. 04-4114                                                  9
    (1989) (emphasis in original). Accord Brosseau v. Haugen,
    
    125 S.Ct. 596
    , 598 (2004) (citing Graham and applying this
    same standard); Lawrence v. Kenosha County, 
    391 F.3d 837
    ,
    843 (7th Cir. 2004) (same). This inquiry involves “a careful
    balancing of the nature and quality of the intrusion on the
    individual’s Fourth Amendment interests against the
    countervailing governmental interests at stake.” Graham,
    
    490 U.S. at 396
     (citations and quotation marks omitted).
    Not surprisingly, this analysis is “not capable of precise
    definition or mechanical application” but “requires careful
    attention to the facts and circumstances of each particular
    case, including the severity of the crime at issue, whether
    the suspect poses an immediate threat to the safety of the
    officers or others, and whether he is actively resisting arrest
    or attempting to evade arrest by flight.” 
    Id.
     (citations and
    quotation marks omitted). See also Tennessee v. Garner, 
    471 U.S. 1
    , 8-9 (1985) (the relevant question is “whether the
    totality of the circumstances justifie[s] a particular sort of
    . . . seizure”).
    Additionally, “the ‘reasonableness’ of a particular use
    of force must be judged from the perspective of a reasonable
    officer on the scene, rather than with the 20/20 vision of
    hindsight.” Graham, 
    490 U.S. at 396
    . In excessive force
    claims, “[t]he calculus of reasonableness must embody
    allowance for the fact that police officers are often forced to
    make split-second judgments—in circumstances that
    are tense, uncertain, and rapidly evolving—about the
    amount of force that is necessary in a particular situation.”
    
    Id. at 396-97
    . Finally, “[a]s in other Fourth Amendment
    contexts, the ‘reasonableness’ inquiry in an excessive force
    case is an objective one: the question is whether the officers’
    actions are ‘objectively reasonable’ in light of the facts and
    circumstances confronting them, without regard to their
    underlying intent or motivation.” 
    Id. at 397
    . Cf. Scott v.
    United States, 
    436 U.S. 128
    , 137-39 (1978); Terry v. Ohio,
    
    392 U.S. 1
    , 21 (1968) (in analyzing the reasonableness of a
    10                                               No. 04-4114
    particular search or seizure, “it is imperative that the
    facts be judged against an objective standard”).
    In the present case the excessive force claim is narrowly
    defined—it concerns only defendant Brooks’ conduct during
    the arrest, and specifically his kneeling on Mohamed’s
    back/shoulder area after he was already lying prone with
    his hands behind him. Plaintiff does not contest the reason-
    ableness of attempting to restrain Mohamed, or of placing
    him on the ground in a prone position. In granting defen-
    dant police officers’ motion for summary judgment below,
    the district court determined that there was no evidence
    that Brooks did anything unreasonable. The court implied
    that the plaintiff was attempting to “put[ ] word in Brooks’s
    mouth” by arguing that there was a question of fact regard-
    ing where Brooks placed his knee or how much force he
    applied. 
    2004 WL 2535426
    , at *8. The court found it
    undisputed that Brooks’ knee was only on Mohamed’s
    shoulder blade, not on his neck or spine. Id. at *9. The court
    also noted that plaintiff has conceded that it was reasonable
    to take Mohamed to the ground, handcuff him and place
    him in leg restraints. Given these findings, the district
    court concluded that “[t]he undisputed evidence shows that
    defendant Brooks applied force to Mohamed’s body in a
    manner and for a time period not likely to cause any serious
    injury to Mohamed.” Id. at *10.
    The court also asserted that violations of police practices
    were not determinative for liability purposes,3 and that,
    absent evidence of objectively unreasonable conduct, the
    mere fact that Mohamed’s injury may have been caused
    by Brooks was insufficient to avoid summary judgment.
    
    2004 WL 2535426
     at *10-11. The district court summarized
    3
    The plaintiff had introduced testimony from police practices
    expert Dennis Waller, who testified that Brooks’ attempt to
    restrain Mohamed violated standard police practices.
    No. 04-4114                                                11
    its conclusions by stating that
    even if one agrees that plaintiff has some evidence that
    would support an inference that Mohamed was not
    injured before his encounter with the police officers,
    [the plaintiff’s] claim fails because she has adduced no
    evidence of specific wrongdoing . . . . no evidence to
    support her theory that Brooks applied force to
    Mohamed’s neck or chest, much less that he did so in a
    manner that carried a substantial risk of causing death
    or serious bodily harm . . . . Absent evidence that
    defendant Brooks’ actions were objectively unreason-
    able, plaintiff’s excessive force claim against defendant
    Brooks fails.
    Id. at *12. In short, the district court concluded that
    plaintiff’s claim hinges on speculation—rather than
    evidence—of unreasonable conduct.
    We review the district court’s summary judgment rul-
    ing de novo. Fix v. Quantum Indus. Partners LDC, 
    374 F.3d 549
    , 552 (7th Cir. 2004); Nevel v. Village of Schaumburg,
    
    297 F.3d 673
    , 678 (7th Cir. 2002). Summary judgment is
    warranted when the evidence, when viewed in a light most
    favorable to the non-moving party, presents “no genuine
    issue as to any material fact” such that “the moving party
    is entitled to a judgment as a matter of law.” Fed. R. Civ. P.
    56(c). See also Celotex Corp. v. Catrett, 
    477 U.S. 317
    , 322-23
    (1986). In applying this standard, all disputed issues of fact
    are to be resolved in favor of the non-moving party. Ander-
    son v. Liberty Lobby, Inc., 
    477 U.S. 242
    , 255 (1986).
    Viewing all the evidence, as we must, in the light most
    favorable to the plaintiff, we are satisfied that there remain
    sufficient factual questions to reach a jury, and thus that
    the district court’s grant of summary judgment was errone-
    ous. It is undisputed that (1) Brooks knelt on Mohamed’s
    shoulder or back for 30-40 seconds while Mohamed was
    prone on the ground, and (2) Mohamed died roughly two
    12                                                  No. 04-4114
    minutes later of severe injuries consistent with pressure or
    crushing trauma to the chest and neck area. There is
    competent expert medical testimony that Mohamed suffered
    these injuries after being put on the ground by the arresting
    officers. Based on these straightforward facts alone, there
    is an issue of material fact as to whether Brooks used an
    unreasonable amount of force against Mohamed. No one
    contends that deadly force was justified once Mohamed was
    lying prone on the ground with his arms behind him, see
    Garner, 
    471 U.S. at 11
     (ruling that deadly force is justified
    only where the officer “has probable cause to believe that
    the suspect poses a threat of serious physical harm, either
    to the officer or others”), and yet the record supports an
    inference that Brooks knelt on Mohamed with enough force
    to inflict lethal injuries. Accordingly, it is for a jury, and not
    for us, to weigh all the evidence and choose between com-
    peting inferences.
    Of course the plaintiff’s claim must fail if Brooks’ conduct
    is considered reasonable as a matter of law. The defendant
    police officers contend—and the district court so ruled—that
    Brooks’ efforts to subdue Mohamed were objectively reason-
    able under the circumstances. Both the defendants and the
    district court rely heavily on Brownell v. Figel, 
    950 F.2d 1285
     (7th Cir. 1991), and Estate of Phillips v. City of
    Milwaukee, 
    123 F.3d 586
     (7th Cir. 1997), in making this
    argument. However, a careful reading reveals that these
    cases are not particularly helpful to the defendants’ cause.
    In Brownell, we rejected an excessive force claim ad-
    vanced by a plaintiff who was involved in a car accident,
    was taken unparalyzed to a hospital and was subsequently
    found to be paralyzed after leaving the hospital and be-
    ing in police custody. Even conceding that the plaintiff may
    have been in police custody while he suffered his injury, we
    refused to indulge plaintiff’s “logic akin to the doctrine of
    res ipsa loquitur.” 
    950 F.2d at 1292
    . Though there was
    No. 04-4114                                                    13
    ample evidence that plaintiff “left the hospital able to
    move and returned a quadriplegic,” absent any evidence
    of specific unreasonable conduct on the part of the offi-
    cers, plaintiff’s claim was doomed. 
    Id.
     A plaintiff may not
    simply claim that the facts support an inference of “exces-
    sive force, the precise nature of which has yet fully to come
    to light.” 
    Id.
     The Court also noted that “although not
    dispositive, no evidence was presented that Brownell
    returned to the hospital with bruises or other signs of
    excessive force.” 
    Id. at 1293
    .
    Phillips concerned the arrest of a an extremely over-
    weight individual with preexisting health problems that
    were not “observable to the untrained eye.”4 
    123 F.3d at 594
    . After taking decedent to the ground and subduing
    him in a manner very similar to the technique used by
    the defendant officers in this case,5 the officers left him
    lying face-down on the ground with his hands handcuffed
    behind him for approximately five minutes. Decedent’s
    weight, his position on the ground and (apparently) his
    preexisting health problems caused him to suffocate. In
    rejecting the excessive force claim brought by the decedent’s
    estate, the court ruled that “placing a person in a prone
    position while handcuffed on the floor does not, in and of
    itself, violate the Fourth Amendment,” and it determined
    that there was no evidence that the police failed to take
    reasonable steps to monitor decedent’s breathing. 
    Id.
     The
    court also cited Brownell for the proposition that claims
    sounding in res ipsa loquitur do not suffice—the plaintiff
    4
    Decedent’s health problems, in addition to obesity, included
    an enlarged heart, an enlarged thyroid, Graves’ disease and a
    thyroid storm.
    5
    Phillips does support the notion that defendant police officers’
    initial restraint and takedown of Mohamed was reasonable;
    however, this issue is not is dispute.
    14                                               No. 04-4114
    must identify specific acts of misconduct by the officer(s) in
    question. 
    Id.
     Yet here again, the Court noted that “[t]he
    medical evidence and witness testimony in this case shows
    that the officers did not punch, slap, kick or otherwise
    deliver a blow to Mr. Phillips’ body.” 
    Id. at 593
    .
    These two cases stand for the proposition that the
    mere fact that an injury occurred while an individual was
    in police custody is not sufficient to avoid summary
    judgment—a plaintiff must identify the specific unreason-
    able conduct that caused his or her injuries. However, in the
    case before us the plaintiff has identified the speci-
    fic misconduct at issue—Brooks placing his knee on
    Mohamed’s back—and she has introduced competent
    medical evidence indicating that it caused deadly in-
    juries. This is not a case where plaintiff’s theory of liabil-
    ity rests merely on the apparent occurrence of an injury
    while in police custody (like Brownell), or on the police’s
    alleged failure to monitor a physically distressed prisoner
    (like Phillips). Rather, here it is alleged that Brooks knelt
    on the decedent’s back with chest-crushing force, and the
    undisputed medical evidence reveals that decedent died
    of injuries consistent with a crushing or squashing-
    type trauma. As the plaintiff points out, the courts in both
    Brownell and Phillips noted that the relevant medical
    evidence did not reveal injuries consistent with excessive
    force. In the present case, the opposite is true. The plaintiff
    ’s
    claim here thus involves different facts, a different theory
    of liability and a crucial difference in the undisputed
    medical evidence than Brownell or Phillips. Those cases do
    not control the outcome here.
    The defendants also place special importance on the
    fact that no eyewitness to the arrest reported seeing anyone
    hit, slap, strike or choke Mohammed. They distinguish the
    present case from others in which police violence was more
    pronounced or aggravated. See, e.g., Champion v. Outlook
    Nashville, Inc., 
    308 F.3d 893
     (6th Cir. 2004) (police sat on
    No. 04-4114                                                15
    a prone, restrained man and continued to pepper spray him
    for seventeen minutes); Drummond v. City of Anaheim, 
    343 F.3d 1052
     (9th Cir. 2003) (police knocked Drummond to a
    prone position, one police officer knelt on him with both
    knees on his back, another officer placed one knee on
    Drummond’s neck, and the officers laughed at Drummond’s
    protests that they were choking him); Frazell v. Flanigan,
    
    102 F.3d 877
     (7th Cir. 1996) (officers kicked Frazell and
    beat him repeatedly with their night sticks after he was
    restrained).
    Certainly, Brooks’ conduct in this case does not appear to
    be as cruel or wanton as that at issue in the cited cases, but
    the evidence still supports an inference that it was unrea-
    sonable. All other details aside, it is undisputed that he
    knelt on Mohamed’s back during the arrest. The reasonable-
    ness of kneeling on a prone individual’s back during an
    arrest turns, at least in part, on how much force is applied.
    Kneeling with just enough force to prevent an individual
    from “squirming” or escaping might be eminently reason-
    able, while dropping down on an individual or applying
    one’s full weight (particularly if one is heavy) could actually
    cause death.
    Of course, Brooks maintains that he knelt only on
    Mohamed’s right shoulder, and only with enough force to
    keep him from “squirming.” But, contrary to the district
    court’s suggestions, his is not the only possible account
    of the incident. The plaintiff asserts that Brooks knelt
    on Mohamed’s back or neck with enough force to crush
    his chest cavity, collapse his left lung and inflict severe
    trauma on Mohamed’s neck—and Dr. Adelman’s medical
    report suggests that he may have done just that. All the
    medical experts in this case agree that Mohamed died of
    a collapsed lung and other injuries consistent with ex-
    treme external pressure, and Dr. Adelman asserted “to a
    high degree of medical probability and virtual certainty”
    that plaintiff suffered these injuries while being subdued by
    16                                                  No. 04-4114
    police. Viewed in this light, Mohamed’s undisputed at-
    tempts to “squirm” or arch his back upward while he was
    being restrained may not constitute resistance at all, but
    rather a futile attempt to breathe while suffering from
    physiological distress “akin to drowning.”
    While the district court suggested that Adelman’s report
    is “conclusory” and that its admissibility at trial is an “open
    question,” 
    2004 WL 2535426
    , at *11, even brief expert
    reports will suffice at the summary judgment stage. See
    Vollmert v. Wisconsin Dept. of Transp., 
    197 F.3d 293
    , 300-01
    (7th Cir. 1999) (to avoid summary judgment, a party’s
    expert need not “give a primer on why the facts allow the
    expert to reach that conclusion”). Similarly, the plaintiff’s
    proffered expert testimony that Brooks’ tactics violated
    standard police practices, while not dispositive,6 may also be
    deemed relevant to the reasonableness inquiry, as might
    the plaintiff’s evidence that Brooks was aware of
    Mohamed’s mental disabilities. See Brooks PRFF ¶¶ 59-68;
    Drumond, 
    343 F.3d at 1057-58
     (decedent’s mental disability
    must be taken into account in the reasonableness inquiry);
    Deorle v. Rutherford, 
    272 F.3d 1271
    , 1282-83 (9th Cir. 2001)
    (same).
    In light of this evidence, plaintiff is correct that she is not
    asking the finder of fact to speculate about the cause
    of Mohamed’s death (as the district court has contended)
    but rather is asking the fact finder to infer causation,
    logically, from undisputed facts and competent evidence.
    Such inferences are often necessary when the plaintiff’s sole
    eyewitness is dead. Similarly, the fact that the available
    eyewitnesses support the defendants’ account of things does
    6
    “
    42 U.S.C. § 1983
     protects plaintiffs from constitutional
    violations, not violations of state laws or, in this case, depart-
    mental regulations and police practices.” Scott v. Edinburg,
    
    346 F.3d 752
    , 760 (7th Cir.2003) (citations omitted).
    No. 04-4114                                                      17
    not preclude the possibility of genuine factual questions.
    The sheer number of witnesses mustered by each side is not
    a relevant consideration, Unterreiner v. Volkswagen of
    America, Inc., 
    8 F.3d 1206
    , 1214 (7th Cir. 1993) (“Perhaps
    Unterreiner could have recruited other employees to offer
    affidavits confirming his own recollection of things, but that
    would only have affected the quantity of the evidence on his
    side, not the quality. The number of witnesses for each
    party is not dispositive at trial, let alone on summary
    judgment.”), and cases may always be proven by circum-
    stantial evidence where direct evidence is unavailable,
    Murrell v. Frank, 
    332 F.3d 1102
    , 1117 (7th Cir. 2003)
    (“Circumstantial evidence is of equal probative value to
    direct evidence and in some cases is even more reliable.”).
    Were it otherwise, a plaintiff might never prevail on an
    excessive force claim where the victim is dead and the
    defendant-police officer is the sole living eyewitness.7
    We have previously held that medical evidence and other
    circumstantial evidence can be sufficient to create triable
    issues of fact in excessive force cases. See Frazell v.
    Flanigan, 
    102 F.3d 877
    , 884 (7th Cir. 1994), abrogated
    on other grounds by Saucier v. Katz, 
    533 U.S. 194
    (2001) (“Consistent with the medical evidence . . . the jury
    could have determined that the officers had used force
    against [plaintiff] far more frequently than they were
    7
    See Plakas v. Drinski, 
    19 F.3d 1143
    , 1147 (7th Cir.), cert. denied,
    
    513 U.S. 820
     (1994): “The award of summary judgment to the
    defense in deadly force cases may be made only with particular
    care where the officer defendant is the only witness left alive to
    testify. In any self-defense case, a defendant knows that the only
    person likely to contradict him or her is beyond reach. So a court
    must undertake a fairly critical assessment of the forensic
    evidence, the officer’s original reports or statements and the
    opinions of experts to decide whether the officer’s testimony could
    reasonably be rejected at a trial.” (Emphasis added.)
    18                                                     No. 04-4114
    willing to admit.”).8 Certainly plaintiff’s proffered
    evidence—including Adelman’s expert testimony—must be
    weighed against the eyewitness accounts offered by the
    defendants themselves and the two civilian onlookers (all of
    whom contend that the defendants did nothing untoward9).
    The conflicting conclusions of the medical experts must also
    be reconciled. But this is just another way of saying that
    there is a genuine issue of fact as to the excessive force
    claim, which must be sorted out by a jury. Concluding that
    Brooks knelt only on Mohamed’s right shoulder and applied
    only reasonable force with his knee (as did the district
    court) ineluctably implies crediting Brooks’ account of the
    incident and discounting Dr. Adelman’s medical testimony.
    This, of course, is improper at summary judgment. At
    summary judgment a court may not assess the credibility of
    8
    The Ninth Circuit also recently made a ruling to this effect in
    a case raising analogous factual questions:
    Here, the officers admit to having applied force when re-
    straining Santos. A jury might find believable the officers’
    contentions that they did so gently, and accordingly might
    return a verdict in their favor. Alternatively, a jury might find
    the officers’ testimony that they were restrained in their use of
    force not credible, and draw the inference from the medical
    and other circumstantial evidence that the plaintiff ’s injuries
    were inflicted on him by the officers’ use of excessive force.
    After all, broken backs do not ordinarily result from the type
    of gentle treatment described by Officer Lee.
    Santos v. Gates, 
    287 F.3d 846
    , 852 (9th Cir. 2002) (emphasis
    added).
    9
    One cannot discount the eyewitness accounts out of hand
    (especially not at the summary judgment stage), though it is an
    open question whether anyone could tell, merely by looking,
    how much force Brooks applied to Mohamed’s back or shoulder.
    Certainly one could see whether anyone applied a choke hold
    to Mohamed, but, as mentioned above, the plaintiff apparently
    does not advance such a claim.
    No. 04-4114                                                  19
    witnesses, choose between competing inferences or balance
    the relative weight of conflicting evidence; it must view all
    the evidence in the record in the light most favorable to the
    non-moving party and resolve all factual disputes in favor
    of the non-moving party. Anderson v. Liberty Lobby, Inc.,
    
    477 U.S. 242
    , 255 (1986).
    When the facts here are viewed, as they must be, in the
    light most favorable to the plaintiff, there remains a
    question of fact as to whether Brooks knelt at the location
    and in the restrained manner that he claims. Simply put,
    the cumulative weight of the medical evidence—particularly
    Dr. Adelman’s testimony—combined with the undisputed
    testimony of Brooks’ conduct during the arrest, supports an
    inference of unreasonable conduct, even if the eyewitness
    testimony does not.10 As one of our sister circuits has
    observed, since the Graham reasonableness inquiry “nearly
    always requires a jury to sift through disputed factual
    contentions, and to draw inferences therefrom, we have held
    on many occasions that summary judgment or judgment as
    a matter of law in excessive force cases should be granted
    sparingly.” Santos, 
    287 F.3d at 853
    . We agree. The ruling of
    the district court with respect to plaintiff’s excessive force
    claim must be reversed and the case remanded for further
    proceedings.
    10
    The dissent’s suggestion that the medical reports are “hind-
    sight” is misleading. Hindsight refers to the application of
    unrealistic standards to past events. The fact that the evidence
    here was necessarily acquired post mortem does not suggest
    that the evaluation of it was anything but realistic. Cause-of-
    death evidence must always be evaluated after the fact; the
    question is whether such medical evidence reveals that the
    defendant officers’ conduct was unreasonable in light of the
    circumstances of the arrest as they were unfolding. Drawing
    inferences as to the reasonableness of police conduct in this
    manner does not impermissibly rely on “hindsight.”
    20                                                 No. 04-4114
    B. Failure to Intervene
    This leads us to the plaintiff’s claim against officers
    Grady, Mueller and Murphy. Under Yang v. Hardin, 
    37 F.3d 282
     (7th Cir. 1994), “[a]n officer who is present
    and fails to intervene to prevent other law enforcement
    officers from infringing the constitutional rights of citizens
    is liable under § 1983 if that officer had reason to know: (1)
    that excessive force was being used, (2) that a citizen has
    been unjustifiably arrested, or (3) that any constitutional
    violation has been committed by a law enforcement official;
    and the officer had a realistic opportunity to intervene
    to prevent the harm from occurring.” Id. at 285 (emphasis
    in original). This Court has implied that a “realistic oppor-
    tunity to intervene” may exist whenever an officer could
    have “called for a backup, called for help, or at least cau-
    tioned [the excessive force defendant] to stop.” Id. Perhaps
    more crucially, this Court has made clear that the prongs of
    this analysis almost always implicate questions of fact for
    the jury: “Whether an officer had sufficient time to inter-
    vene or was capable of preventing the harm caused by the
    other officer is generally an issue for the trier of fact unless,
    considering all the evidence, a reasonable jury could not
    possibly conclude otherwise.” Lanigan v. Village of East
    Hazel Crest, Ill., 
    110 F.3d 467
    , 478 (7th Cir. 1997) (empha-
    sis added).
    Yet even under this stringent standard, the question here
    is a close one. There is little direct evidence suggesting that
    Grady, Mueller and Murphy should have recognized that
    illegal conduct was occurring, or that they had a reasonable
    opportunity to intervene. As a general matter, it would be
    difficult to infer such facts solely from the kind of medical
    evidence introduced here, and all of the available eyewit-
    nesses suggest that Brooks’ actions did not appear unrea-
    sonable. On the other hand, it is undisputed that Mueller,
    Grady and Murphy were mere feet away from Brooks while
    the conduct in question occurred, and the plaintiff has also
    No. 04-4114                                                21
    introduced expert testimony that Brooks’ efforts to restrain
    Mohamed violated standard police practices. While the
    question certainly gives us pause, we must conclude, under
    these circumstances and in light of the severity of
    Mohamed’s injuries, that questions of fact remain with
    respect to the intervention claim no less than for the
    underlying excessive force claim.
    Depending upon how the jury evaluates the evidence
    of Brooks’ conduct, it could conclude, consistent with the
    evidence, that one or more of the other officers could and
    should have attempted to prevent Mohamed’s injuries.
    Based on the medical evidence, a jury could determine
    that Brooks choked or otherwise abused Mohamed in a
    fashion visible to onlookers. At the least, a reasonable jury
    might conclude (if the plaintiff’s theory of the case is
    credited) that the other officers should have cautioned
    Brooks to stop kneeling on Mohamed’s back. Cf. Yang, 
    37 F.3d at 285
    . Such a conclusion would render the plaintiff’s
    intervention claim quite tenable. Thus, given that the
    excessive force claim against Brooks is not amenable to
    summary judgment, the associated failure to intervene
    claims must go to trial as well. The parties have not
    identified any consideration that would warrant stray-
    ing from this Court’s directive in Lanigan, which in-
    structs that the intervention inquiry should be left to the
    jury.
    As a last-ditch effort to win the day, defendants argue (in
    just three pages of their appellate brief) that they
    are entitled to qualified immunity. In Harlow v. Fitzgerald,
    
    457 U.S. 800
     (1982), the Supreme Court held that “govern-
    ment officials performing discretionary functions generally
    are shielded from liability for civil damages insofar as their
    conduct does not violate clearly established statutory or
    constitutional rights of which a reasonable person would
    have known.” 
    Id. at 818
    . Thus, in order to survive summary
    judgment on grounds of qualified immunity, a plaintiff must
    22                                               No. 04-4114
    (1) allege violation of a valid legal right and (2) demonstrate
    that “it would be clear to a reasonable officer that his
    conduct was unlawful in the situation he confronted.”
    Saucier, 533 U.S. at 201-02.
    Here the plaintiff has certainly alleged violation of a valid
    constitutional right—if defendant Brooks applied deadly
    force to Mohamed while he was lying prone on the ground
    with his arms behind him, this would violate Mohamed’s
    Fourth Amendment rights, as would an unjustifiable failure
    by the other officers to intervene. However, whether it
    would have been clear to a reasonable officer that Brooks’
    actions constituted unreasonable force under the circum-
    stances—thus triggering the duty to intervene—is obviously
    a more difficult question. Presumably, if it would have been
    apparent to the other officers, just by watching, that Brooks
    was applying potentially deadly pressure to Mohamed while
    he was lying prone, then the officers would not be entitled
    to qualified immunity. Again, no one contends that deadly
    force was warranted in this case.
    However, it may have been difficult to tell how much force
    Brooks was applying, and at least one or two of the officers
    (those attempting to restrain Mohamed’s legs) had their
    back to Brooks during the encounter. Additionally, this
    Court’s 1997 decision in Estate of Phillips ruled that a
    similar takedown—during which one officer put a knee in
    Phillips’ back for about one minute—was not unreasonable
    under the circumstances. 
    123 F.3d at 593
    . However, since
    the very nature of Brooks’ conduct remains undetermined,
    one can only speculate as to how visually obvious any
    violation of Mohammed’s rights might have been. In other
    words, without knowing what Brooks did or how his conduct
    appeared to onlookers, it would be difficult to say that, as a
    matter of law, a reasonable officer could not have known
    that Brooks’ conduct violated Mohamed’s constitutional
    rights. A jury should decide whether Brooks’ actions would
    have made it clear to a reasonable officer that intervention
    No. 04-4114                                                  23
    was warranted, and, if so, whether Grady, Mueller and
    Murphy had a realistic opportunity to intervene.
    Accordingly, we also reverse the district court’s grant
    of summary judgment in favor of the defendants on plaintiff’s
    failure to intervene claim and remand this claim for further
    proceedings as well.11
    IV. CONCLUSION
    For the foregoing reasons, we REVERSE the district court’s
    grant of summary judgment in favor of the defendants and
    REMAND the case for further proceedings not inconsistent
    with this opinion.
    EVANS, Circuit Judge, dissenting. Although I agree, as
    the majority observes, that this case marks the “tragic final
    chapter” in the life of Jamal Mohamed, I do not think his
    survivors offer sufficient evidence to keep the case going
    any longer. I would affirm Judge Crabb’s order granting
    summary judgment for the defendants.
    As the majority notes, “the plaintiff’s claim must fail if
    Brooks’ conduct is considered reasonable as a matter of
    law,” a standard discussed at length in Brownell and
    Phillips. The majority reads those cases to “stand for the
    proposition that . . . a plaintiff must identify the specific
    11
    Obviously, there is substantial evidence exculpating all four
    of the officers, which will be heard by the jury.
    24                                               No. 04-4114
    unreasonable conduct that caused his or her injuries.” The
    majority distinguishes those cases by finding that, unlike
    Brownell and Phillips, the plaintiff here (Mohamed’s
    mother) identifies specific unreasonable conduct—Brooks
    pushing down on Mohamed’s back—and presents sufficient
    medical evidence to support the claim.
    While Brooks’ actions might well have caused Mohamed’s
    death, I part company with the majority on the question of
    whether the evidence is sufficient to show that his actions
    were in any way unreasonable under the circumstances. In
    answering that question, the majority cites the medical
    report suggesting that Brooks might have pushed too hard
    on Mohamed’s back or neck while trying to restrain him.
    Relying on that report, however, ignores the well-estab-
    lished rule that a police officer’s conduct in a struggle like
    the one that occurred here must be judged from the perspec-
    tive of a reasonable officer on the scene, not the “20/20
    vision of hindsight.” Graham v. Connor, 
    490 U.S. 386
    , 395
    (1989).
    It was that understanding of the law, and not just
    the failure of the plaintiffs to identify specific conduct,
    that led us to reject “logic akin to the doctrine of res ipsa
    loquitur” in a situation like the one we have here. See
    Phillips, 
    123 F.3d at 594
    ; Brownell, 
    950 F.2d at 1292
    .
    By relying on the medical records to support the plain-
    tiff’s claim that Brooks might have pressed too hard,
    however, that is precisely the logic the majority uses. The
    question is not whether, looking back, Brooks might have
    pressed harder than he should have—in hindsight, perhaps
    he did. Instead, though, we should ask only whether, at the
    time, Brooks acted reasonably. And, given what appeared
    to the police on the scene to be a very dangerous situation,
    the plaintiff offers no evidence that Brooks’ actions, includ-
    ing pushing down on Mohamed’s back to get him under
    control, were unreasonable.
    No. 04-4114                                                25
    Throughout the short encounter, Mohamed acted errati-
    cally and violently. He punched nurse McCarty and began
    swinging his belt over his head when Officer Murphy
    approached him. He strenuously resisted as police tried to
    handcuff him. It was only then—while a man, who had just
    punched someone trying to help him, threateningly swung
    his belt at a police officer, and tried to resist, even when on
    the ground, as several officers tried to handcuff him—that
    Brooks began applying weight to Mohamed’s back and
    shoulder area. Brooks’ knee was on Mohamed for around a
    half a minute, and Mohamed was breathing when Brooks
    got up (suggesting that Brooks had no reason to know that
    he was pressing too hard, if he in fact was). The plaintiff
    offers absolutely no evidence to rebut this view of what
    happened. As Judge Crabb observed, “[t]he undisputed
    evidence shows that defendant Brooks applied force to
    Mohamed’s body in a manner and for a time period not
    likely to cause any serious injury to Mohamed.” That the
    force applied may have, in fact, caused a fatal injury to
    Mohamed is tragic, but it does not mean that the force
    applied was unreasonable. For these reasons, I respectfully
    dissent.
    A true Copy:
    Teste:
    ________________________________
    Clerk of the United States Court of
    Appeals for the Seventh Circuit
    USCA-02-C-0072—9-12-05