The state medical examiner says convicted killer Thomas Capano, who was found dead in his prison cell, died of sudden cardiac arrest.
The medical examiner also said Tuesday that 61-year-old Capano, who was found dead Monday, had atherosclerotic and hypertensive cardiovascular disease, and that obesity was a contributing factor in his death.
Capano, a once wealthy and politically connected attorney in Delaware, was serving life in prison for killing a mistress, Anne Marie Fahey, in 1996.
Capano was sentenced to life in prison after his death sentence was overturned by the state Supreme Court in 2006.
Fahey's body was never found. Prosecutors said Capano, a former state prosecutor and legal counsel to Gov. Michael Castle, stuffed her body inside a cooler and dropped it in the Atlantic Ocean.