Steven Kiley, who reportedly shot and killed New York State Trooper Nicholas Clark early Monday, was in possession of a dozen illegal firearms at the time of his death, according to a press release from the state police.

According to troopers, Kiley, who was the principal at Bradford Central School, had eight assault rifles, three handguns and another rifle, plus two silencers (sound suppressors) and multiple high-capacity ammunition magazines.

The press release also included results from autopsies conducted on both men at Lourdes Hospital in Binghamton.

The results indicated that Trooper Clark was killed by buckshot from a 12-gauge shotgun.

State police also reported that Kiley died as a result of a self-inflicted gunshot wound to the head, but that he had already received a gunshot wound to the chest from law enforcement that would have been fatal regardless of any other injuries.

Clark, along with other members of the New York State Police, Steuben County Sheriff’s Office and Corning Police Department, responded to Welch Road at approximately 3:30 a.m. Monday for a report of a suicidal man barricaded in his residence.

During the course of the response, according to authorities, Trooper Clark, 29, of Troupsburg, was shot and killed by Kiley, 43.

Funeral services for Trooper Clark will be held at 11 a.m. Sunday at Alfred University.