Man accused of fatally shooting three people in parking lot of Target store reportedly has history of violence and mental health issues.

Adam Chow, along with his 4-year-old granddaughter Astrid Fung, and Rosa Martinez Machuca were killed in what police have described as a "random attack."

Austin police named Ethan Nieneker as the suspect in a North Austin Target shooting that killed three, including a child; he faces capital murder charges.