The shooter entered the class, placed a duffel bag on the ground, turned off the lights, took out two handguns and began firing, police said.

According to police, the gunman fired 52 shots with two Glock 9×19mm semiautomatic pistols before committing suicide by shooting himself in the head with a .45-caliber revolver.

The Allegheny County Medical Examiner's office identified the three women who died as Heidi Overmier, 46, of Collier Township; Elizabeth Gannon, 49, of Green Tree, Pennsylvania; and Jody Billingsley, 38, of Mt.

[5] George Alfred Sodini (September 30, 1960[6] – August 4, 2009), a 48-year-old systems analyst at the law firm of K&L Gates and a resident of Scott Township, was identified as the perpetrator.

[8] On a website registered in his name,[9] Sodini chronicled over a nine-month period his rejections by women and his severe sexual frustration.

In 2008, Sodini posted online videos, in which he discusses his emotions, along with a tour of his home, the latter which was a homework assignment from "a self-help seminar [he] had attended on how to date women".

TGSCOM also sold an empty magazine and a holster to Steven Kazmierczak, who shot and killed five people at Northern Illinois University in 2008.

Victims of the shooting claim that the insurance company neglected to ensure Sodini got mental health care.