After having fatally shot several people in the room at the manufacturing business he had worked for 15 years, he stormed into the warehouse, the witnesses said.
In a rampage that lasted about 90 minutes before the police killed him in a shootout, Martin killed five people and injured six people – including five officers.
"During this meeting, he was terminated, and my understanding from the witnesses is that he opened fire right after the termination," Aurora Police Chief Kristen Ziman said at a news conference Saturday. "We believe that several people who were involved in that meeting are those who are dead."
While it is not known whether gunman knew that he would be fired when he brought a firearm to his workplace, company official said he
Scott Hall, CEO of Mueller Water Products, which owns Henry Pratt Co., said the company has a progressive discipline process that can result in termination. [1
"The only thing I know is that he was called in," Ziman said. "Once again we can assume that he was speculative about what was going to happen as evidenced by him arming himself with a firearm … I do not exactly know what was communicated to him."
He ' went ballistic 'and opened fire
"As soon as I saw the green thing and heard the shots, we left," said John Probst, who has been working at the plant for 40 years. "He started to open the room and he was just shooting everybody."
Probst said one of the victims who ran out with his arm bleeding told him the gunman "went ballistic."
Four minutes after the first Call to 911, police officers arrived on the scene and came under immediate fire, possibly from a window, police said.
All those who were killed or injured by gunfire – except for the gunman – appear to have been hit The first few minutes of the incident, Ziman said.
The shooting was stopped as Martin apparently hid deeper in the warehouse. He was found about an hour and a half into a hunt in a rear machine shop, police said. He opened fire and the officers fired back, killing him, authorities said.
Police released details about the victims. They included a plant manager, a human resources manager, an intern on his first day, and two other workers who were gunned down in the attack. Another of the gunman's colleagues was wounded.
He also shot at responding police, wounding five. Police released the names of the five workers killed at the industrial valve manufacturer's 29,000-square-foot warehouse:
• Clayton Parks of Elgin, Illinois, human resource manager
• Trevor Wehner of DeKalb, Illinois, a human resource intern and a student at Northern Illinois University
• Russell Beyer of Yorkville, Illinois, a mold operator
• Vicente Juarez of Oswego, Illinois, a stockroom attendant and forklift operator
• Josh Pinkard of Oswego, Illinois, the plant manager.
The names of the five wounded police officers and the wounded worker, all men, were not immediately released. Police said that four of the wounded officers were shot and one had shrapnel wounds.
At least three of the officers were still hospitalized on Saturday, police said.
He did not legally own the gun
He has been issued a firearm owner's identification card, or a FOID card, in January 2014, and, according to Ziman, a 40-caliber Smith & Wesson handgun was handled by a dealer.
Authorities discovered that the gunman was convicted of an aggravated assault in Mississippi in 1995.
But when he applied for a concealed-carry permit, Ziman said his concealed-carry permit was rejected and his FOID card was revoked. State police sent him a letter telling him to voluntarily relinquish his weapon to police, Ziman said.
How was the gunman end up keeping the gun going to be part of the investigation of the incident.
"We're looking at whether we followed up on that, and what agencies followed up on that," she said. 19659002]
2 million victims a year
More than 2 million Americans each year report as victims of workplace violence, according to the federal government. Kathleen Bonczyk, founder and executive director of the Florida-based non-profit Workplace Violence Prevention Institute, said Kathleen Bonczyk, "The point of termination is perhaps the greatest opportunity for deadly workplace violence."
Bonczyk said the firing of long-term employees can involve the greatest risk
"It's almost like a divorce from a family," she said. "Americans today tend to spend more time at work than they do even at home. They tend to have more lunches, dinners, meals, time spent with their coworkers. You're severing perhaps the most stable relationships that a worker may have."