The shooting started sometime after 2:30 p.m. in the parking lot of the store at 3600 Table Mesa Drive. A livestream video, taken by local videographer Dean Schiller, who had just walked out of the store, showed what appeared to be victims and a man wearing a King Soopers employee uniform saying the shooter was inside the store.

Then what sounded like two gunshots could be heard over the video.

Two roommates who were buying pizza at the self-checkout watched the shooter come into the store. “He just came in and started shooting” without saying a word, one of them told The Denver Post on condition of anonymity to avoid national media attention. His roommate said the gunman “let off a couple of shots, then was silent, and then he let off a couple more. He wasn’t spraying.”