Corey Burton 's manager : Autopsy showed actor 's heart was beating when he died . Haim was born December 23 , 1971 , in Toronto , Ontario , according to a biography on his Web site . Coroner told Haim 's manager that he died from pulmonary congestion , Mark Heaslip said . Coroner 's official said they are running toxicology tests before deciding on cause of death . Actor , who struggled for decades with drug addiction , died early Wednesday .
Corey Burton 's manager : Autopsy showed actor 's heart was beating when he died . Coroner told Haim 's manager that he died from pulmonary congestion , Mark Heaslip said . Coroner 's official said they are running toxicology tests before deciding on cause of death . Actor , who struggled for decades with drug addiction , died early Wednesday .