Gunman ID'd in Pittsburgh psychiatric clinic shootings; weapon stolen Police gather on a street near the front entrance to the Western Psychiatric Institute and Clinic on Thursday after gunfire erupted inside. By NBC News. msnbc.com staff and news services PITTSBURGH -- At least one of the two semiautomatic handguns used by a man who killed one person and shot several others at a University of Pittsburgh psychiatric clinic was stolen, police said Friday. Authorities identified the gunman, who was shot dead by police, as 30-year-old John Shick. Police still don't have a motive for Thursday's shooting at Western Psychiatric Institute and Clinic. Shick is believed to have lived in Pittsburgh's Shadyside neighborhood near the hospital. At a Friday news conference, police said it's too early for them to have determined if Shick had any criminal history or mental health problems. Police confirmed what they'd previously believed was true: At least one University of Pittsburgh police officer shot and killed Shick to end the rampage. The gunman had two semiautomatic pistols when he shot seven people, including 25-year-old Michael Schaab, of Edgewood, who was pronounced dead at the scene about 80 minutes after the shooting began, the medical examiner's office said. An eighth person was hurt, but officials say that injury was not gunshot-related. The surviving victims are all expected to recover. Authorities said the two handguns were traced to Texas, and one of them had been reported stolen. Police said the suspect was carrying ammunition, and there was no indication he had a conversation with anyone before opening fire. Mary Schaab, the dead victim's mother, told The Associated Press on Friday that authorities have told them "absolutely nothing" beyond notifying them of her son's death. A state trooper from a barracks nearest to their Greensburg home brought the news to the family late Thursday night. Until the trooper arrived, the family was glued to television news reports but assumed her son was safe, Schaab said. "We sat and watched the news for hours and not even thinking (he might be a victim) because he worked on another floor, an upper floor," Schaab said. The shooting occurred in the first-floor lobby. Schaab said her son had worked at the clinic since graduating with a psychology degree from Pitt, and was going back to school to get his master's in occupational therapy. He had also recently gotten engaged. "We were just planning his wedding," she said, sobbing. March 2013. Michael Schaab had just one sibling, a sister Nancy, 26, who was fatally shot during a domestic dispute in October 2010. Her live-in boyfriend is serving 6 to 15 years in prison for voluntary manslaughter. Schaab said her son loved his job and that his patients and their families thought highly of him. "I have letters from patients' families that just raved about him, about how good he was to their spouses or mother or father," Schaab said. He was the best person in the whole world. Hide! The clinic was open Friday and police and extra security could be seen checking employee's identification as they entered the front lobby, where authorities say the shootings occurred. Gregory Brant told the AP he was barricaded in a first-floor waiting room when the gunfire began Thursday afternoon. For 15 minutes, it was fear and pandemonium. We heard a bunch of yelling, some shooting, people yelling, 'Hide! Hide!' Brant said. Everyone's yelling, 'Stay down!' Brant and six other people, including a young girl and her parents, were in a waiting room when the chaos began. They cowered in a corner, hoping they wouldn't be seen. But the men in the room quickly decided that if the gunman entered, they'd rush him. "We were kind of sitting ducks," Brant said. Luckily, he didn't see us in there, and we didn't make eye contact with him. Officials at the University of Pittsburgh Medical Center said they were treating five adult patients, including two who had undergone surgery. The hospital said a man and a woman were listed in serious condition Friday morning. John Leight Sr., of Shaler Township, told the AP that the woman is his 64-year-old wife, Kathryn Leight, a receptionist at the clinic. Leight's son, John Jr., told the Pittsburgh Post-Gazette that the family has been told his stepmother had been shot four times and underwent emergency surgery. He said the woman remained in intensive care, but had been taken off a ventilator and was breathing on her own. Two others were treated and released, according the hospital officials. One of the injured was a police officer who was grazed by a bullet. The injured people included employees and a visitor, said Dr. Donald Yealy, chair of emergency medicine at the university's medical school. The clinic is a couple of miles from downtown, near the heart of the Pitt campus and its affiliated medical center. The Associated Press contributed to this story.