Mike Starr’s roommate, who was not identified by name during his TMZ interview, says that the reality star was taking methadone and anxiety medication just before he died on Tuesday, a combination which may have been lethal.

The roommate said Starr was still working toward sobriety following his Celebrity Rehab and Sober House stints, but on Monday night he was “mixing” his medications. Officially, the cause of death for the former Alice in Chains bassist has not been determined.

“Mike [Starr] was a beautiful person who was fighting to stay sober,” said the roommate. “I am going to miss him greatly.”

And so will we. Once the official cause of death has been released, we’ll let you know. Follow VIP Breakdown on Twitter to get all the headlines quickly.