A former middle school teacher and band bass player who was critically injured as he tried to subdue an unruly patron last month at an Adams Morgan bar has died, and the D.C. chief medical examiner has ruled the case a homicide, authorities said Saturday.

Rockwell John Flint, 45, of Northwest D.C., died Friday, and the medical examiner ruled the same day that the death was a homicide, caused by multiple blunt impact injuries, police said in a news release. He had been in critical condition since Aug. 30, when he was injured attempting to subdue a patron who threw a glass at a bartender and swung a stool at people at the Rendezvous Lounge on 18th Street NW.

The patron, 37-year-old James Wood, was also hurt in the encounter and hospitalized; police have said he and Flint grappled with each other and fell down the bar’s stairs. A D.C. police spokesman said Saturday afternoon that he would have to research Wood’s current condition.

Flint’s family members either did not return messages or declined to comment Saturday. Authorities and those who knew him have said previously that he once taught in the D.C. school system and played bass in a band. He also worked in the call center for the Shakespeare Theatre Company, an official there said.

Wood was charged after the incident with assault with a dangerous weapon, and D.C. Police Chief Cathy L. Lanier ordered Rendezvous Lounge closed for 96 hours for public safety reasons, though it was later allowed to reopen. Efforts to reach the owners of Rendezvous Lounge were unsuccessful Saturday.

It remains unclear whether the charges against Wood will be upgraded. A spokesman for the U.S. Attorney’s Office in D.C. did not immediately return a message seeking comment, and a D.C. police spokesman said he would have to research that question, too.