The 38-year-old Gray was found dead Monday in a hotel room in the Des Moines suburb of Urbandale. There was no indication of foul play.
Urbandale police Sgt. Dave Disney says the Polk County medical examiner's office started the autopsy Tuesday morning.
Disney says because of the interest in Gray's death, he hopes the results, including toxicology tests, can be expedited and made available later Tuesday.
A hotel employee found Gray dead in a room at the TownePlace Suites.
Disney declined to say where Gray was found or to provide details about what was in the room.
