CHESAPEAKE, Virginia (AP) — The Walmart supervisor who fatally shot six co-workers at a store in Virginia bought the gun just hours before the killings and left a note on his phone accusing colleagues of mocking him, authorities have said.

“Sorry everyone but I did not plan this I promise things just fell in place like I was led by the Satan,” Andre Bing wrote on a note that was left on his phone, the Chesapeake Police Department said.

Police said the 9mm handgun used in the Tuesday night shooting was legally purchased that morning and that Bing had no criminal record. They released a copy of the note found on his phone that appeared to redact the names of specific people he mentioned.

It was not clear when the note was written, but in it Bing claimed he was harassed and said he was pushed to the brink by a perception his phone was hacked.

He wrote, “My only wish would have been to start over from scratch and that my parents would have paid closer attention to my social deficits.” Bing died at the scene of an apparent self-inflicted gunshot wound.

Coworkers of Bing who survived the shooting said he was difficult and known for being hostile with employees. One survivor said Bing seemed to target people and fired at some victims after they were already hit.

Jessica Wilczewski said workers were gathered in a store break room to begin their overnight shift late Tuesday when Bing, a team leader, entered and opened fire. While another witness has described Bing as shooting wildly, Wilczewski said she observed him target certain people.

“The way he was acting — he was going hunting,” Wilczewski told The Associated Press on Thursday. “The way he was looking at people’s faces and the way he did what he did, he was picking people out.”

Wilczewski said she had only worked at the store for five days and being a new employee may have been the reason she was spared.

She said she was hiding under a table after the shooting started and that at one point, Bing told her to get out from under the table. But when he saw who she was, he told her, “Jessie, go home.”

Former coworkers and residents of Chesapeake, a city of about 250,000 people near Virginia’s coast, have been struggling to make sense of the rampage.