The man suspected of fatally shooting three people, including a child, in a Target parking lot in Austin, Texas, told police that he was Jesus and obtained a firearm through a family member despite a history of mental health issues, authorities said.

Police identified the shooter as Ethan Nieneker, 32, and said that he began his attack by fatally shooting Target employee Hector Leopoldo Martinez Machuca as he collected shopping carts on Aug. 11. Nieneker then ran up to a gray Toyota 4-Runner, and fatally shot Adam Chow and his 4-year-old granddaughter before pushing Chow's wife from the vehicle, police said in a news release. Chow's wife survived with minor injuries.

"What happened yesterday was an unprovoked and deliberate attack, a deliberate act of violence," Austin Police Chief Lisa Davis said on Aug. 12. "Innocent lives were taken in broad daylight, in a place where people should feel safe to run their everyday errands and to live their everyday lives."

USA TODAY is working to reach an attorney or family member who can speak on Nieneker's behalf.

Following the killings at 2:15 p.m. CT, police say that Nieneker stole Chow's car and made a chaotic getaway, assaulting multiple people and stealing cars along the way. Here's a timeline released by authorities: