A Colorado paramedic who was sentenced to five years in prison for his role in the 2019 death of Elijah McClain had his sentence reduced to probation on Friday.

The paramedic, Peter Cichuniec, a former lieutenant with Aurora Fire Rescue, was convicted of criminally negligent homicide and the more serious second-degree assault in the death of Mr. McClain, in a case that became part of a national movement against police brutality. Mr. McClain, a 23-year-old Black man, died after a confrontation with Aurora, Colo., police, in which officers put him in a chokehold and a paramedic injected him with ketamine.

Mr. Cichuniec was the supervisor of the paramedic who gave what prosecutors said was an excessive amount of the powerful sedative. In March, Judge Mark Warner of Adams County District Court sentenced Mr. Cichuniec to five years in prison, the statutory minimum.

On Friday, the judge said that he had reduced the sentence because of “unusual and extenuating circumstances,” according to The Denver Post.

Prosecutors, who tried the five police officers and paramedics involved in Mr. McClain’s death, called the decision disappointing.

“After considering the evidence, a statewide grand jury indicted Cichuniec, and a jury of his peers found him guilty of his criminal acts that led to the death of Elijah McClain,” the Colorado Attorney General’s Office said in a statement. “We are disappointed the court reduced his sentence today, but we respect the court’s decision.”

This is a developing story. Check back for updates.