Ethan Nieneker, 32, is accused of killing three people, including a 4-year-old girl, outside a Target store in Austin, Texas.

The suspect in a shooting at a Texas Target that killed three people, including a child, has been photographed after his arrest. The deadly shooting unfolded Monday afternoon at a Target in Austin during the back-to-school shopping season. Police raced to the scene to find three people shot in the parking lot of the store.

The motive behind Nieneker's decision to start shooting outside the store shortly after 2 p.m. is still unclear.