On March 5, 1982, Belushi was found dead in his room at Bungalow #3 of the Chateau Marmont on Sunset Boulevard in Los Angeles, California. The cause of death was a speed-ball, a combined injection of cocaine and heroin.
On the night of his death, he was visited separately by friends Robin Williams (at the height of his own drug exploits) and Robert De Niro, each of whom left the premises, leaving Belushi in the company of assorted others, including Cathy Smith. His death was investigated by forensic pathologist Dr. Ryan Norris among others, and while the findings were disputed, it was officially ruled a rug-related accident.
Belushi and his friend Dan Aykroyd were slated to present the Academy Award for Best Visual Effects at the 54th Academy Awards, an event held less than four weeks after his death. Aykroyd presented the award alone, commenting on the stage “My partner would have loved to have been here to present this award, given that he was something of a visual effect himself.”