Attorneys for the family of a man who died from “sudden cardiac arrest” after North Carolina police officers repeatedly used stun guns on him renewed calls Friday for the officers involved to be fired and criminally charged.

The Jan. 17 death of 32-year-old Darryl Tyree Williams was determined to be a homicide related to cocaine intoxication, physical exertion, conducted energy weapon use and physical restraint, according to a state autopsy report obtained by the Associated Press this week. Cocaine and a chemical contained in marijuana were found in his blood, the outlet reported, citing a toxicology report.

When asked about the drugs found in Williams’ system, civil rights attorney Ben Crump, who is representing the family, accused officials of “moving the goal posts” at a Friday news conference.

“The autopsy tells us it was a homicide,” Crump said. “Everybody who looks at that video sees that Darryl Tyree Williams was walking, talking, breathing just fine until those officers tased him excessively after he told them that he had heart problems. So madam (district) attorney, I don’t know how many more excuses you’re going to come up with before you finally say ‘We gotta charge these officers.'”

What happened to Darryl Tyree Williams?

Officers were conducting “proactive patrols” in southeast Raleigh when they encountered Williams in the driver’s seat of a car and another person in the passenger seat, according to a preliminary report from the Raleigh Police Department. An officer saw a open container of alcohol and marijuana in the car and asked Williams and the passenger to get out, according to the report.

The officer attempted to arrest Williams for possession of a controlled substance after finding a folded dollar bill with white powder in his pocket, according to the report. During the attempted arrest, police said Williams was shocked three times and eventually handcuffed by officers.

Amid a flurry of commands and uses of a stun gun, Williams at times appeared to flee, only to be brought to the ground by officers, footage of the arrest released by a judge in February shows.