An autistic, nonverbal teenager from Idaho, who was repeatedly shot by police while holding a knife behind a chain-link fence, passed away Saturday after being taken off life support, according to his family.

Seventeen-year-old Victor Perez, who also suffered from cerebral palsy, had been in a coma since the incident on April 5. His aunt, Ana Vazquez, informed The Associated Press that tests on Friday confirmed he had no brain activity. Perez underwent several medical procedures, during which nine bullets were removed, and a leg was amputated.

Officers in Pocatello, a city in southwest Idaho, responded to an emergency call reporting a seemingly drunk individual brandishing a knife and pursuing someone in a backyard. It was later determined to be Perez, who was not under the influence but exhibited a staggered walk due to his conditions, according to Vazquez. His family had been attempting to take the large kitchen knife from him.

This photo provided by Ana L Vazquez, shows Victor Perez in a hospital bed in Pocatello, Idaho.  (Ana L. Vazquez via AP)

Video taken by a neighbor showed that Perez was lying in the yard after falling over when four officers arrived and rushed to the fence at the edge of the yard. They immediately ordered Perez to drop the knife, but instead he stood and began stumbling toward them.

Officers opened fire within about 12 seconds of getting out of their patrol cars and made no apparent effort to de-escalate the situation.

The shooting outraged Perez’s family and Pocatello residents, and a vigil had been planned for Saturday morning outside the Pocatello hospital where he was treated.

“Everybody was trying to tell the police, no, no,” Vazquez said. “Those four officers didn’t care. They didn’t ask what was happening, what was the situation.”

“How’s he going to jump the fence when he can barely walk?” she said.

The officers, whose names have not been released, were placed on administrative leave.

Decisions about whether charges should be filed against them will be made after an independent investigation by the Eastern Idaho Critical Incident Team, Bannock County Prosecutor Ian Johnson told the AP via email.

“When that investigation is complete a report will be submitted for review,” he said. “In a continued effort to ensure independent and objective consideration, said report will be reviewed by an agency outside of Bannock County.”

Pocatello Mayor Brian Blad said in a statement Friday, after the family announced that Perez had no brain activity, that officials’ thoughts and prayers were with them.

“We recognize the pain and grief this incident has caused in our community,” Blad said.

Blad said Thursday that the city was “addressing this matter with the seriousness and thoroughness it deserves and with the appropriate respect for the gravity of the situation.”

“The criminal, external, and internal investigations regarding the officer-involved shooting are underway, which is why we cannot answer questions out of concern of interfering with or compromising the investigation,” he said.