A combination of heroin, cocaine and Valium accidentally killed Blues Traveler bassist Bobby Sheehan, the New Orleans coroner announced Wednesday (Oct. 21), according to the Associated Press. Sheehan, who was 31, was found dead by friends at his home in New Orleans on Aug. 20. "It's very sad," Dr. Frank Minyard was quoted as saying by AP. "This guy had a bright future." Sheehan pleaded guilty in January 1998 to possessing less than a gram of cocaine after he was arrested in September 1997 at an airport in Winnipeg, Manitoba. The surviving members of Blues Traveler announced earlier this month they would continue as a band. Spokespersons for the group could not be reached immediately for comment.