There are new details about the death of Peter Greene - and it is so tragic! Two months after the Pulp Fiction actor was found dead in his Manhattan apartment, his cause of death has been revealed. The Office of the Chief Medical Examiner in New York City told TMZ on Wednesday that Peter died from a gunshot wound to the left axilla with an injury to the brachial artery. His manner of death has been classified as an accident. Related: Tommy Lee Jones' Daughter's Cause Of Death Revealed What does all that mean? Peter accidentally shot himself in the left armpit.