Corey Haim Died of Natural Causes: Coroner Heart trouble, pneumonia claimed actor By John Johnson, Newser Staff Posted May 4, 2010 4:35 PM CDT 9 comments Comments This undated publicity image originally provided by A&E shows actor Corey Haim, who appeared in the A&E reality TV show "The Two Coreys." (AP Photo/Courtesy AETN, L. Pief Weyman) (Newser) – Corey Haim did not die of a drug overdose, says the Los Angeles coroner. The late actor's cause of death was determined to be diffuse alveolar damage—damage to the heart—and pneumonia, E! Online reports. No drugs played a role, and the coroner declared the manner of death to be "natural."