Belcher, who committed suicide outside the Chiefs' Arrowhead Stadium practice facility shortly after the Dec. 1 slaying of Kasandra Perkins, had a blood-alcohol content of 0.17 at the time of his death, a report obtained by The Kansas City Star revealed.
Police say Belcher, 25, shot and killed Perkins -- the mother of his 3-month-old daughter -- in the Kansas City-area home they shared, then drove to the Chiefs' facility and killed himself with a different weapon in the parking lot.
The Star said the autopsy revealed Perkins was shot nine times. One of the shots was fired close to her right hand, indicating she was trying to defend herself.
Several wounds suggested Perkins was on the floor when some of the shots were fired.
Police theorized Belcher's blood-alcohol content was 0.22 or more when he was roused by police while sleeping in his car in front of another girlfriend's residence about 5 hours before the shooting.
Although police determined he had been drinking, Belcher wasn't arrested or cited after he told them he was heading inside to see the woman who lived in the apartment, USA Today reported.