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No. 9999647
United States Court of Appeals for the Ninth Circuit
Zachary Rosenbaum v. City of San Jose
No. 9999647 · Decided July 11, 2024
No. 9999647·Ninth Circuit · 2024·
FlawFinder last updated this page Apr. 2, 2026
Case Details
Court
United States Court of Appeals for the Ninth Circuit
Decided
July 11, 2024
Citation
No. 9999647
Disposition
See opinion text.
Full Opinion
FOR PUBLICATION
UNITED STATES COURT OF APPEALS
FOR THE NINTH CIRCUIT
ZACHARY ROSENBAUM, No. 22-16863
Plaintiff-Appellee, D.C. No. 5:20-cv-
v. 04777-NC
CITY OF SAN JOSE; BRET
HATZENBUHLER, SAN JOSE OPINION
POLICE DEPARTMENT
SERGEANT; HYMEL DUNN,
RYAN FERGUSON, FRANCISCO
VALLEJO, GARY ANDERSON,
SAN JOSE POLICE DEPARTMENT
OFFICERS,
Defendants-Appellants,
Appeal from the United States District Court
for the Northern District of California
Nathanael M. Cousins, Magistrate Judge, Presiding
Argued and Submitted February 8, 2024
San Francisco, California
Filed July 11, 2024
Before: Ryan D. Nelson, Danielle J. Forrest, and Gabriel
P. Sanchez, Circuit Judges.
Opinion by Judge Sanchez
2 ROSENBAUM V. CITY OF SAN JOSE
SUMMARY *
Excessive Force/Qualified Immunity/Police Dogs
The panel affirmed the district court’s denial of qualified
immunity to City of San Jose police officers in an action
alleging that the officers used excessive force when they
deployed a police dog that allegedly bit plaintiff Zachary
Rosenbaum for more than twenty seconds after he had
surrendered and lay prone on his stomach with his arms
outstretched.
The panel noted that in its limited interlocutory review,
it viewed the facts in the light most favorable to Rosenbaum
unless they were blatantly contradicted by the record,
including the video evidence in this case. Contrary to
defendants’ contention on appeal, bodycam video from the
arrest did not contradict, and generally supported,
Rosenbaum’s allegation that while he lay on his stomach “in
full surrender with his hands stretched out and surrounded
by all named defendants with their firearms trained on him,”
the police dog “was allowed to continue biting [him] for over
20 seconds, before being pulled away.” At a minimum,
whether the officers acted reasonably in permitting the
police dog to hold the bite for its duration under these
circumstances was a triable question to be decided by a jury.
Further, this Circuit’s caselaw clearly establishes that
officers violate the Fourth Amendment when they allow a
police dog to continue biting a suspect who has fully
surrendered and is under officer control.
*
This summary constitutes no part of the opinion of the court. It has
been prepared by court staff for the convenience of the reader.
ROSENBAUM V. CITY OF SAN JOSE 3
COUNSEL
Fulvio F. Cajina (argued), Law Office of Fulvio F. Cajina,
Oakland, California; Stanley C. Goff, Stanley Goff, San
Francisco, California; for Plaintiff-Appellee.
Kendra E. McGee (argued), Senior Deputy City Attorney;
Maren J. Clouse, Chief Deputy City Attorney; Ardell
Johnson, Assistant City Attorney; Nora Frimann, City
Attorney; Office of the City Attorney, San Jose, California;
for Defendant-Appellants.
OPINION
SANCHEZ, Circuit Judge:
During the arrest of plaintiff Zachary Rosenbaum,
officers of the San Jose Police Department deployed a police
dog that allegedly bit him for more than twenty seconds after
he had surrendered and lay prone on his stomach with arms
outstretched. Rosenbaum sued the City of San Jose and
several officers involved in the arrest under 42 U.S.C.
§ 1983, alleging that Defendants’ excessive force violated
the Fourth Amendment and resulted in severe lacerations
and permanent nerve damage to his arm. Defendants now
appeal the district court’s denial of their motion for summary
judgment based on qualified immunity.
On interlocutory review, we view the facts in the light
most favorable to Rosenbaum unless they are “blatantly
contradicted” by video evidence. See Scott v. Harris, 550
U.S. 372, 380 (2007). Contrary to Defendants’ contention
on appeal, bodycam video from the arrest does not
contradict, and generally supports, Rosenbaum’s allegation
4 ROSENBAUM V. CITY OF SAN JOSE
that while he lay on his stomach “in full surrender with his
hands stretched out and surrounded by all named Defendants
with their firearms trained on him,” the police dog “was
allowed to continue biting [him] for over 20 seconds, before
being pulled away.” At a minimum, whether the officers
acted reasonably in permitting the police dog to hold the bite
for its duration under these circumstances is a triable
question to be decided by a jury. Further, our caselaw clearly
establishes that officers violate the Fourth Amendment when
they allow a police dog to continue biting a suspect who has
fully surrendered and is under officer control. Accordingly,
we affirm the denial of qualified immunity.
I.
On the evening of September 10, 2019, San Jose police
responded to a domestic violence report at Rosenbaum’s
partner’s home. The arrest team included Sergeant Bret
Hatzenbuhler; canine Officer Hymel Dunn and his police
dog “Kurt;” and Officers Ryan Ferguson, Francisco Vallejo,
and Gary Anderson. Officer Dunn testified that no other
officer on the scene was trained in handling Kurt. 1 Prior to
the officers entering the house, Rosenbaum’s partner told
them that Rosenbaum was under the influence of alcohol or
1
Although Officer Dunn was the only officer in charge of the police dog
and trained to control him, the district court held that there was a material
dispute of fact as to whether Sergeant Hatzenbuhler and Officers
Anderson, Ferguson, and Vallejo were “integral participants” in Officer
Dunn’s use of excessive force and therefore also potentially subject to
liability. See Boyd v. Benton County, 374 F.3d 773, 780 (9th Cir. 2004)
(Officers may be liable for a Fourth Amendment violation under the
“integral participation analysis,” which “does not require that each
officer’s actions themselves rise to the level of a constitutional
violation.”). Because Defendants do not challenge the district court’s
integral participant determination on appeal, we do not address it.
ROSENBAUM V. CITY OF SAN JOSE 5
narcotics and that he had previously owned firearms, but she
believed they were destroyed in a fire. 2
After announcing their presence, Officer Dunn released
Kurt into the first floor of the house to search for
Rosenbaum, and officers entered the home soon thereafter.
Officers cleared the first floor and then positioned
themselves at the bottom of a stairwell leading to the second
story, with firearms drawn and pointed upward. Rosenbaum
was at the top of the second story landing, wearing a tank top
and sweatpants. Sergeant Hatzenbuhler testified that the
officers had no reason to believe that anyone else was
upstairs with him. Over the next six minutes, officers
instructed Rosenbaum that he was under arrest and
commanded him to come down the stairs and surrender.
Rosenbaum did not comply and repeatedly questioned why
he was under arrest. During this exchange, officers warned
Rosenbaum that if he did not come down the stairs, a police
dog would be sent upstairs and would bite him.
Approximately nine minutes after officers entered the
home, Officer Dunn released Kurt and Officer Ferguson
simultaneously fired a stun bag. 3 Officers ascended the
stairs in single formation and apprehended Rosenbaum near
the second-floor landing. As officers approached
Rosenbaum, he was found unarmed and seated with his back
against the wall and Kurt biting his right forearm.
2
Rosenbaum’s partner also told officers that Rosenbaum had fought with
police in a prior domestic violence incident and that he was trained in
mixed martial arts and boxing. Officers could not confirm whether the
allegations were true. Rosenbaum denies these claims.
3
The parties agree that approximately 43 seconds elapsed between the
time Officer Dunn deployed Kurt to the time he commanded the dog to
release Rosenbaum.
6 ROSENBAUM V. CITY OF SAN JOSE
Rosenbaum alleges that “Officer Dunn deployed his police
K-9 to attack and bite [him] even though [Rosenbaum] had
his hands visibly raised in a surrender position, was not
armed, was not trying to evade arrest, and had posed no
threat to the officers.” Rosenbaum further alleges “that after
the K-9 was deployed to bite [Rosenbaum], and while
[Rosenbaum] was laying on his stomach in full surrender
with his hands stretched out and surrounded by all named
Defendants with their firearms trained on him, that the K-9
was allowed to continue biting [him] for over 20 seconds,
before being pulled away.”
Bodycam video of the arrest generally supports
Rosenbaum’s allegations. As officers reached the second-
floor landing, Rosenbaum can be seen seated with his back
against the wall and Kurt biting his right forearm. The video
does not show any resistance by Rosenbaum, and indeed
Officer Dunn testified that Rosenbaum did not attempt to
strike or kick the officers, punch the police dog, use
threatening language, or flee the scene at any point during
the encounter. Approximately five seconds after officers
reached the second floor, Kurt dragged Rosenbaum onto his
stomach. The bodycam video shows Rosenbaum sliding
down without resistance as Officer Dunn says “good boy.”
At least one officer’s gun is drawn and pointed at
Rosenbaum. Another officer stands on Rosenbaum’s legs as
Rosenbaum yells out for his partner and says, “he’s bleeding
me out.” The video then shows one officer holding
Rosenbaum’s left arm behind his back while Kurt pulls
Rosenbaum’s right arm above his head, and a third officer
planting his foot on Rosenbaum’s right shoulder. Kurt
continued to pull Rosenbaum’s arm over his head, giving
one last forceful shake before Officer Dunn commanded the
dog to let go of Rosenbaum’s arm. In short, the video
ROSENBAUM V. CITY OF SAN JOSE 7
evidence supports Rosenbaum’s allegation that a police dog
bit him for more than twenty seconds after he had
surrendered and lay prone on his stomach with arms
outstretched.
Rosenbaum was taken to the hospital for treatment of
multiple puncture wounds and lacerations. He required
several surgeries and claims he has permanent damage to his
arm. He was later charged with two counts of felony assault
by means of force likely to produce great bodily injury
pursuant to California Penal Code § 245(a)(4), to which he
pled no contest and served 90 days in jail, with other
conditions.
II.
Defendants appeal from the denial of their motion for
summary judgment. Normally, a pretrial order is not an
appealable final order, but “[w]e may . . . review orders
denying qualified immunity under the collateral order
exception to finality.” Ballou v. McElvain, 29 F.4th 413, 421
(9th Cir. 2022) (citing Plumhoff v. Rickard, 572 U.S. 765,
771-73 (2014)). The scope of our review, however, is
“circumscribed.” Foster v. City of Indio, 908 F.3d 1204,
1210 (9th Cir. 2018) (per curiam) (quoting George v. Morris,
736 F.3d 829, 834 (9th Cir. 2013)). Defendants “may not
immediately appeal ‘a fact-related dispute about the pretrial
record, namely, whether or not the evidence in the pretrial
record was sufficient to show a genuine issue of fact for
trial.’” Id. (quoting Johnson v. Jones, 515 U.S. 304, 307
(1995) (emphasis in original)). In other words, “[a]ny
decision by the district court that the parties’ evidence
presents genuine issues of material fact is categorically
unreviewable on interlocutory appeal.” George, 736 F.3d at
834 (cleaned up). Instead, we must consider only “whether
8 ROSENBAUM V. CITY OF SAN JOSE
the defendant would be entitled to qualified immunity as a
matter of law, assuming all factual disputes are resolved, and
all reasonable inferences are drawn, in plaintiff’s favor.”
Karl v. City of Mountlake Terrace, 678 F.3d 1062, 1068 (9th
Cir. 2012).
We review the district court’s denial of qualified
immunity de novo. See Est. of Aguirre v. County of
Riverside, 29 F.4th 624, 627 (9th Cir. 2022). Where factual
disputes exist as to the objective reasonableness of an
officer’s conduct, the case cannot be resolved at summary
judgment on qualified immunity grounds. See Torres v. City
of Madera, 648 F.3d 1119, 1123 (9th Cir. 2011) (“Where the
objective reasonableness of an officer’s conduct turns on
disputed issues of material fact, it is a question of fact best
resolved by a jury.” (cleaned up)). We must affirm the
district court’s denial of qualified immunity if, resolving all
factual disputes and drawing all inferences in Rosenbaum’s
favor, Defendants’ conduct (1) violated a constitutional right
(2) that “was clearly established at the time of the officer[s’]
alleged misconduct.” Est. of Aguirre, 29 F.4th at 627
(citation omitted).
“A right is clearly established when it is ‘sufficiently
clear that every reasonable official would have understood
that what he is doing violates that right.’” Rivas-Villegas v.
Cortesluna, 595 U.S. 1, 5 (2021) (citation omitted). Law
enforcement officers “are entitled to qualified immunity
unless existing precedent ‘squarely governs’ the specific
facts at issue.” Kisela v. Hughes, 584 U.S. 100, 104 (2018)
(citation omitted). Although there need not be a Supreme
Court or circuit case directly on point, “existing precedent
must have placed the statutory or constitutional question
beyond debate.” White v. Pauly, 580 U.S. 73, 79 (2017)
(citation omitted).
ROSENBAUM V. CITY OF SAN JOSE 9
The constitutional right at issue in this appeal has been
clearly established by our precedents. A police officer
violates the Fourth Amendment when he or she allows a
police dog to continue biting a suspect who has fully
surrendered and is under officer control. 4 See Mendoza v.
Block, 27 F.3d 1357 (9th Cir. 1994); Watkins v. City of
Oakland, 145 F.3d 1087 (9th Cir. 1998); Miller v. Clark
County, 340 F.3d 959 (9th Cir. 2003). In Mendoza, we held
that “no particularized case law is necessary for a deputy to
know that excessive force has been used when a deputy sics
a canine on a handcuffed arrestee who has fully surrendered
and is completely under control.” 27 F.3d at 1362.
We reaffirmed in Watkins that an officer violates clearly
established law by allowing a police dog to continue biting
a suspect after the suspect’s surrender, even when the
suspect is not handcuffed. 145 F.3d at 1090, 1093. In
Watkins, a police officer responded to a silent alarm at a
commercial warehouse and released a police dog to locate
the plaintiff. Id. at 1090. The police dog found the plaintiff
hiding under a car and bit him. Id. Upon arriving on the
scene, the officer did not call the dog off and instead ordered
the plaintiff to show his hands. Id. Recoiling from the dog
bite, the plaintiff could not comply with the order and the
dog continued biting him for ten to thirty more seconds. Id.
On interlocutory review, we affirmed the district court’s
denial of qualified immunity, holding that the plaintiff had
adequately alleged a constitutional violation where the
officer “continued to allow [the dog] to bite him even though
he was obviously helpless and surrounded by police officers
with their guns drawn.” Id. at 1090, 1094. Further, we
4
Whether the officers were permitted to deploy the police dog in the first
instance is not at issue in this appeal.
10 ROSENBAUM V. CITY OF SAN JOSE
explained that “it was clearly established that [the] excessive
duration of the bite and improper encouragement of a
continuation of the attack by officers could constitute
excessive force that would be a constitutional violation.” Id.
at 1093; see Hernandez v. Town of Gilbert, 989 F.3d 739,
745 (9th Cir. 2021) (reaffirming that Watkins clearly
established “that an officer cannot direct a police dog to
continue biting a suspect who has fully surrendered and is
under the officer’s control”).
On the other hand, we have concluded that an officer
does not act unreasonably in deploying a police dog to detain
a suspect where the officer releases the dog from its bite as
soon as he determines that the suspect is unarmed. See
Miller, 340 F.3d at 960–61. In Miller, a sheriff’s deputy
deployed a police dog to locate a potentially armed suspect
who had fled into dense, dark, wooded property. Id.
Approximately one minute after the dog was released, the
deputy heard the plaintiff scream, and the deputy
immediately ran towards the sound. Id. at 961. Because of
the dark terrain, it took the deputy between forty-five and
sixty seconds to arrive at the location. Id. Although the
plaintiff sustained serious injuries from the prolonged dog
bite, we concluded that the force used was not excessive. Id.
at 961, 968. Central to our analysis was the fact that the
deputy had “commanded [the police dog] to release Miller
as soon as [the deputy] determined that Miller was
unarmed,” and the dog promptly let go of Miller. Id. at 961,
967 n.12.
Rosenbaum has adequately alleged a constitutional
violation that was clearly established at the time of
Defendants’ alleged misconduct. Rosenbaum alleges that
Defendants allowed the police dog Kurt to continue biting
him for more than twenty seconds after he had fully
ROSENBAUM V. CITY OF SAN JOSE 11
surrendered and was under officer control. Rosenbaum
alleges that he was not trying to evade arrest or flee, and
“was laying on his stomach in full surrender” with his hands
outstretched and officers surrounding him with their
firearms pointed at him. The bodycam video shows that
Rosenbaum did not resist when Kurt pulled him onto his
stomach, nor did Rosenbaum fight with officers or attempt
to get up or escape. Officer Dunn similarly testified that
Rosenbaum did not strike or kick the officers, punch the
police dog, use threatening language, or flee the scene at any
point during the period in which he was bitten. The bodycam
video also supports Rosenbaum’s contention that he was
under officer control over that twenty-second interval, with
at least one officer pointing his firearm at Rosenbaum,
another officer standing on Rosenbaum’s legs, and a third
officer planting his foot on Rosenbaum’s right shoulder.
Resolving all factual disputes and drawing all inferences
in Rosenbaum’s favor, a reasonable jury could find that
Defendants exceeded the force reasonably necessary to
effectuate an arrest by allowing Kurt to continue biting
Rosenbaum for more than twenty seconds after he had fully
surrendered and was under officer control. Accepting
Rosenbaum’s version of events, Kurt continued to bite him
even as he was in an “obviously helpless” situation, lying
prone with arms outstretched, multiple officers
immobilizing his arms and legs, and another officer pointing
a firearm at him. See Watkins, 145 F.3d at 1090, 1093. And
unlike Miller, Officer Dunn did not immediately release
Kurt from the bite as soon as he determined that Rosenbaum
was unarmed. See 340 F.3d at 967 n.12. The video instead
shows Kurt continuing to bite Rosenbaum for more than
twenty seconds after Defendants reached Rosenbaum near
12 ROSENBAUM V. CITY OF SAN JOSE
the second-floor landing and he slid down onto his stomach
in a prone position.
Defendants’ contention that the law was not clearly
established under the circumstances of this appeal is in
actuality a challenge to the sufficiency of the evidence.
Defendants argue that “[t]here was no clear indication that
Rosenbaum was surrendering” or that he was sufficiently
under their control. In our limited interlocutory review,
however, we view the facts in the light most favorable to
Rosenbaum unless they are “blatantly contradicted by the
record, so that no reasonable jury could believe it.” Scott,
550 U.S. at 380. Far from contradicting his allegations, the
video and record evidence generally supports Rosenbaum’s
excessive force claims. At a minimum, whether the officers
acted reasonably in allowing the police dog to continue
biting Rosenbaum is a question for the jury. See Johnson,
515 U.S. at 307, 313 (holding that on interlocutory appeal
from the denial of summary judgment based on qualified
immunity, appellate courts lack jurisdiction to review
“whether or not the evidence in the pretrial record was
sufficient to show a genuine issue of fact for trial.”).
It was clearly established at the time of Rosenbaum’s
arrest that an officer violates a suspect’s right to be free from
excessive force under the Fourth Amendment when the
officer allows a police dog to continue biting the suspect
after the suspect has fully surrendered and is under officer
control. See Watkins, 145 F.3d at 1090, 1093; Mendoza, 27
F.3d at 1362; Miller, 340 F.3d at 961, 967 n.12. Viewing the
factual allegations in the light most favorable to Rosenbaum,
a reasonable jury could find that Rosenbaum had fully
surrendered and was under officer control when he lay on his
stomach with his arms outstretched, was not actively
resisting arrest or attempting to get up or flee, and where
ROSENBAUM V. CITY OF SAN JOSE 13
officers had immobilized his arms and legs and were
pointing their firearm at him. A reasonable officer in Officer
Dunn’s position would know that allowing a police dog to
continue biting Rosenbaum for an extended period of time
after he had surrendered in this way is a violation of clearly
established law.
AFFIRMED.
Plain English Summary
FOR PUBLICATION UNITED STATES COURT OF APPEALS FOR THE NINTH CIRCUIT ZACHARY ROSENBAUM, No.
Key Points
01FOR PUBLICATION UNITED STATES COURT OF APPEALS FOR THE NINTH CIRCUIT ZACHARY ROSENBAUM, No.
0204777-NC CITY OF SAN JOSE; BRET HATZENBUHLER, SAN JOSE OPINION POLICE DEPARTMENT SERGEANT; HYMEL DUNN, RYAN FERGUSON, FRANCISCO VALLEJO, GARY ANDERSON, SAN JOSE POLICE DEPARTMENT OFFICERS, Defendants-Appellants, Appeal from the United State
03Cousins, Magistrate Judge, Presiding Argued and Submitted February 8, 2024 San Francisco, California Filed July 11, 2024 Before: Ryan D.
04CITY OF SAN JOSE SUMMARY * Excessive Force/Qualified Immunity/Police Dogs The panel affirmed the district court’s denial of qualified immunity to City of San Jose police officers in an action alleging that the officers used excessive force
Frequently Asked Questions
FOR PUBLICATION UNITED STATES COURT OF APPEALS FOR THE NINTH CIRCUIT ZACHARY ROSENBAUM, No.
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This case was decided on July 11, 2024.
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