The 71-year-old was found in a hotel in Palo Alto, CA on July 21. The Santa Clause Clara County Medical Examiner's Office directed a post-mortem examination and discovered Heard passed to a "sudden cardiac death due to atheroscerotic and hypertensive heart disease."
Heard had experienced minor back surgery two days before his demise at Stanford Restorative Center (a short separation away) and was remaining in that hotel while he recuperated. In any case, authorities say Heard's "recent back surgery did NOT play a role in his death." With respect to toxicology, the outcomes have not been made open.