Dog Bite | Animal Behavior Expert Witness For Attorneys

Richard H. Polsky, PhD, CDBC
Los Angeles, California

“Bringing the science of animal behavior to attorneys”


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A blatant example of excessive force by an attack-trained police K-9

canine excessive force expert

Blatant examples of excessive force delivered by a police K-9 can be found on videos on YouTube, such as in this example.  In any given instance when canine force is used apprehend a criminal suspect, there is the potential for a violation of the individual’s fourth amendment rights as specified in the United States Constitution.

Recently, I received an inquiry from a victim of a vicious police K-9 attack seeking my expert opinion about whether he was attacked with excessive force by the dog.

This victim wrote:

“I am a victim of a police k-9 attack. I believe it was excessive force as evidenced by the k-9 first ran by and bumped me, at which time I went down on the ground as instructed by officers. I heard the dog run away then came back 1-2 mins later, while I was on the ground with my hands behind my back, and the dog attacked me by viciously biting, holding down on my right lateral, and shaking its head violently, side to side. It had never experienced such an extreme pain.  I suffered severe lacerations and abrasions on my side, left forearm and hands.  Murrieta Police Department transported me to Rancho Springs Medical Center in the same city. The hospital only x-ray’d my left forearm.  MPD refused to have AMR transport me to the hospital, in spite of having an ambulance and paramedics on the scene. Do you believe this is an example of excessive force by police K-9?”

M. Gonzalez,  Murietta, California

Was Mr. Gonzalez attacked excessively by this police K-9?  Does he have a strong basis to file a lawsuit against the municipality and the officers which authorize the use of this K-9? Obviously so, particularly given that the victim had already surrendered to the police.  The description the victim gives of this incident is consistent with the manner in which police train their canines to bite and hold. Namely, latching onto the subject, vigorously shaking, and holding the bite until commanded to release by the handler. Unfortunately, the technique of bite and hold is highly unreliable. And, studies have found that dogs trained in the bite and hold technique is no less dangerous than dogs trained in supposedly a less violent apprehension technique such as find and bark.

Attack train police canines are inherently dangerous animals because these kinds of dogs have been selectively bred for aggression, because of the way in which they have been trained and because when deployed in the field for suspect apprehension they are on a mission to find someone to bite in order to “get the job done”. Police canines are impulsive. Police canines are unable to make a quick second decisions regarding whether an attack on a person is warranted or if the suspect has surrendered.

Examples of appellate decisions involving municipalities use of police dogs include the matter of Rosenberg v. Vangelo.  In this instance, the court ruled that the police department and the municipality could be held liable based in part to employ training techniques that would reduce the risk of harm to a suspect, particularly in dogs with high bite ratio. In Hooper v. County of San Diego  the appellant was arrested for resisting arrest, after the police discovered that she was in possession of methamphetamine. A police K-9 was called in and tore off large portions of the appellant’s scalp. The court ruled that being arrested for resisting arrest did not bar the appellant’s claim of excessive force if against the County.

In general, lawsuits against police K-9 departments and their handlers are difficult to win. One reason for this is because the police K-9 handler may not represent accurately what happened during any given incident. Another reason is that the plaintiffs who file lawsuits are often minorities and these people may not present themselves well before a jury. Police departments vigorously defend their canine handlers and their partners. in canine handlers frequently cover-up for the behavioral mistakes their dogs make.

More about the nature of the attack trained police K-9 be found elsewhere on this website. Liability aspects for municipalities who authorize the use of these dogs can be found here.  Resources on excessive force by police canines can be found here.

Related Links

A brutal attack by police K-9 in Atlantic City New Jersey
St. Paul Minnesota questions use of attack-trained police canines questions
A vicious attack by police K-9 in 2017 incident in San Diego CA. captured on video
Throw a dog a suspect: When using police dogs becomes an unreasonable use of force
Website summarizing older but not necessarily irrelevant appellate decisions
Reno man mauled by a police dog to get $17,500 settlement
Legal analysis of a well-publicized excessive force appellate decision
Woman Bitten By Police Dog As She Slept Is Challenging How Cops Use Dogs
When Police Dogs Grow Too Vicious
Palo Alto to pay $250,000 to black teen bitten by police K9
A bite by a San Diego police dog could be a severe use of force, appeals court rules
Eleventh circuit grants immunity in police dog bite force case
Greenville police dog accused of mauling the handcuffed man
Colorado man sues after police dog bites him after he repeatedly ran from police
Peer-reviewed research paper on the severity of injury caused by police K9 bite
Attorney on police K-9 attacks discusses the value of videos for K9 excessive force lawsuits