Actor John Heard, well-known for his role as Peter McAllister in the first two Home Alone movies, apparently had a cocktail of narcotics in his system when he died, according to his official autopsy. TMZ reports they obtained a copy of the late actor’s toxicology report, which revealed he had Buprenorphine, Fentanyl, Hydromorphone,  Oxycodone, Tramadol, and Xanax in his …