Louisville Police Officer Involved in Breonna Taylor Killing Sues Her Boyfriend Kenneth Walker

Louisville Metro Police Department Jonathan Mattingly

One of the officers involved in the fatal shooting of Breonna Taylor is now suing her boyfriend for “battery, assault and emotional distress” on the night of the March 13 incident.

A new civil suit filed against Kenneth Walker, obtained by PEOPLE, claims that Louisville Police Sgt. Jonathan Mattingly experienced “severe trauma, mental anguish and emotional distress” on the night that Taylor, 26, was killed after officers executed a no-knock search warrant at her apartment.

That night, Walker, a licensed gun-owner, grabbed his firearm and ultimately fired it. He has long maintained that he believed someone was trying to break into the apartment. Kentucky Attorney General Daniel Cameron has asserted Walker’s bullet struck an officer, and officers returned fire with 32 shots, six of which struck Taylor.

“Walker’s conduct in shooting Mattingly is outrageous, intolerable and offends all accepted standards of decency and morality,” reads the lawsuit.

Walker was initially charged with attempted murder for allegedly hitting an officer in the thigh when he fired his gun. Those charges have since been dismissed, and he has since filed a civil suit against the department. Mattingly, via the countersuit, is seeking a jury trial, damages and attorney/medical fees after being shot in the thigh that night.

An attorney for Walker did not immediately respond to PEOPLE’s request for comment.

RELATED: Breonna Taylor’s Boyfriend ‘a Million Percent Sure’ Police Didn’t ID Themselves Before He Fired Shots at Them

Breonna Taylor/ Instagram; Chris Tuite/ImageSPACE/Shutterstock Breonna Taylor and Kenneth Walker

Want to keep up with the latest crime coverage? Sign up for PEOPLE’s free True Crime newsletter for breaking crime news, ongoing trial coverage and details of intriguing unsolved cases. 

In statement to PEOPLE, Mattingly’s attorney Kent Wicker said: “Sgt. Mattingly was shot and nearly killed by Kenneth Walker. He’s entitled to, and should, use the legal process to seek a remedy for the injury that Walker has caused him.”

Story continues

Walker’s attorney, Steve Romines, told CBS News in a statement that his client is “protected by law under KRS 503.085 and is immune from both criminal prosecution and civil liability as he was acting in self defense in his own home.”

“Even the most basic understanding of Kentucky’s ‘Stand Your Ground’ law and the ‘Castle Doctrine’ evidences this fact. One would think that breaking into the apartment, executing his girlfriend and framing him for a crime in an effort to cover up her murder would be enough for them. Yet this baseless attempt to further victimize and harass Kenny indicates otherwise,” continued Romines.

Last month, Cameron announced that none of the three police officers involved in the warrant that night would be charged in connection with Taylor’s death. Instead, one of the officers, Brett Hankison, was indicted on wanton endangerment charges for allegedly firing bullets that risked injury to persons in an adjacent apartment. Hankinson was also fired from the police department.

RELATED VIDEO: 1 Officer Charged, 2 Cleared in Shooting Death of Breonna Taylor, Grand Jury Decides

1 Officer Charged, 2 Cleared in Shooting Death of Breonna Taylor, Grand Jury Decides

Breonna Taylor was fatally shot by police in Louisville, Ky., on March 13

RELATED: Breonna Taylor’s Mom Worried ER Tech Daughter Would Get Coronavirus Before Police Killed Her

In an interview with CBS This Morning co-host Gayle King earlier this month, Walker said the Louisville officers who entered Taylor’s apartment that night never announced themselves, contradicting Cameron’s assertion that the officers did. He said he’s “a million percent sure that nobody identified themselves” outside Taylor’s door.

A wrongful death lawsuit filed by Taylor’s mother, Tamika Palmer, alleges Walker fired a warning shot as the then-unknown persons breached the front door with a battering ram, and that officers responded by firing into the apartment.

“I never thought it was the police,” Walker told King. “Because why would the police be coming here?”

The shooting took place while police were executing a search warrant for an investigation into a suspected drug dealer, who police alleged had once retrieved a package at Taylor’s home. But the suspected drug dealer didn’t live at Taylor’s apartment — and had, in fact, just been arrested at a different location. No drugs were found in Taylor’s apartment.

To help combat systemic racism, consider learning from or donating to these organizations: