Pink Taco founder Harry Morton died unexpectedly in November at the age of 38—and now there's an official cause of death. People cites the determination by the Los Angeles County Medical Examiner-Coroner: Morton died of natural causes as the result of a probable cardiac arrhythmia, with "myocardial bridging with coronary artery atherosclerosis" listed as a secondary cause. A rep for Morton's family had previously noted the restaurateur had a "mildly enlarged heart" and coronary artery disease.
Per TMZ, the report notes no alcohol or drugs were found in Morton's system. Morton was said to have been training for a marathon and was supposed to have met his brother at the gym on the morning of Nov. 23. When Harry didn't show for their workout, Matthew headed over to his brother's house, where he found an unresponsive Harry on the bathroom floor. The Morton brothers' father, Peter Morton, is the co-founder of the Hard Rock Cafe, while their grandfather Arnie Morton founded the upscale Morton's The Steakhouse. (Read more celebrity death stories.)