On Friday, Martin, who had been an employee of the Henry Pratt Co. for 15 years, opened fire at a meeting during which he was being terminated from his job, according to Aurora Police Chief Kristen Ziman.
Ziman said that Martin shot at the person who was firing him and others in the meeting before moving outside the room.
“We believe that several people who were involved in that meeting are the ones who are deceased,” Ziman said during a press conference on Saturday.
Martin killed five people in total and injured several police officers during the rampage on Friday afternoon, before being shot and killed by police.
During the press conference, Ziman named the victims, who were all employees of Henry Pratt Co.: Clayton Parks, the human resources manager; Trevor Wehner, a human resources intern and a student at Northern Illinois University; Russell Beyer, a mold operator; Vicente Juarez, a stock room attendant and forklift operator; and Josh Pinkard, the plant manager.
Another unidentified victim was treated at a nearby hospital for non-life-threatening gunshot wounds.
The injuries the police officers sustained during the shooting are all considered non-life-threatening.
On Saturday, Ziman said that Martin, 45, purchased a handgun on March 6, 2014, after being issued an Illinois Firearm Owner’s Identification (FOID) Card in January of that year. The firearm, a Smith & Wesson .40 caliber, was in Martin’s possession as of March 11, 2014.