According to witnesses, Martin had arrived for work at his regular scheduled 7am,, but then after lunch walked down an aisle of the warehouse, shooting ‘everybody’ with a pistol that had a laser scope attached to it.
One witness who spoke to ABC said: ‘I saw a guy running down the aisle, with a pistol, I recognized him as a co-worker and he was shooting everybody.’
The man added: ‘One of the guys was up in the office, he said this person was shooting’, and, he come running down and he was bleeding pretty bad, and the next thing you know he was walking back and forth, I heard more shots, and we just left the building.’
‘I saw a guy running down the aisle, with a pistol, I recognized him as a co-worker and he was shooting everybody

The five police officers who were shot are all in a stable condition and are expected to survive. Two were airlifted to trauma centers. A sixth officer was being treated for a knee injury.
‘Thank you for your selfless act,’ Ziman said to the officers and other law enforcement officials at the 5.30pm press conference. ‘Thank you for running towards gunfire and putting your lives in danger to protect those inside the business.’

Aurora Mayor Richard Irvin also spoke at the initial press conference.
‘It’s a shame that mass shootings such as this have become commonplace in our country,’ he said. ‘It’s a shame that a cold and heartless offender would be so selfish as to think he has the right to take an innocent life. But we as a society cannot allow these horrific acts to become commonplace.’
President Trump reacted to the shooting on Twitter Friday evening, writing: ‘Great job by law enforcement in Aurora, Illinois. Heartfelt condolences to all of the victims and their families. America is with you!’
Hundreds of law enforcement officials from local agencies in addition to SWAT teams, FBI agents and ATF officers remained on the scene hours after the shooting.
Schools in the area including a university were placed on lock-down until the scene was secured.