Lifestyle | Slipknot 'Accidental' OD Killed Slipknot Bassist Coroner blames morphine for Paul Gray's death By Rob Quinn Posted Jun 22, 2010 3:40 AM CDT Copied Brenna Gray speaks about the death of her husband, Slipknot bassist Paul Gray during a news conference, Tuesday, May 25, 2010, in Des Moines, Iowa. (AP Photo/Charlie Neibergall) An "accidental" overdose of morphine and the painkiller fentanyl caused the death of Slipknot bassist Paul Gray last month, according to autopsy results. The coroner says the 38-year-old also suffered from "significant heart disease," Reuters reports. Investigators found no evidence that Gray had prescriptions for either the morphine or the fentanyl. Read These Next Updated list of free days at national parks is raising some eyebrows. A kidney recipient died of rabies from the infected donor. Want to know how the economy is doing? Check Dollar Tree's stats. Judge blocks DOJ from certain evidence in Comey case. Report an error