State police say an autopsy shows the gunman who lured two New York firefighters to their deaths died of a self-inflicted shot to the head and wasn't hit by return fire from a police officer.

A positive identification of the body found in 62-year-old gunman William Spengler's burned house hasn't been made yet. Police believe it was his sister.

Troopers say Thursday autopsies show West Webster firefighter Michael Chiapperini died of a single gunshot and Tomasz Kaczowka (TOH'-mahz kah-CHOOV'-skah) died of two shots.