Police say Nikolas Cruz has confessed to killing 17 people in America's deadliest-ever high school shooting—but they haven't disclosed a motive for Wednesday's rampage at Marjory Stoneman Douglas High School in Parkland, Fla. According to police and court records released Thursday, the 19-year-old was only in the building for around six minutes, starting when he was dropped off by an Uber at 2:19pm, USA Today reports. Two minutes later, he activated a fire alarm and began shooting a semi-automatic rifle in a hallway before firing into classrooms, police say. At 2:25pm, he dropped the rifle and blended in with fleeing students. Police say he went to a Walmart, had a drink at a Subway outlet, then went to a McDonald's. He was arrested around an hour later when a deputy saw him walking down a street. In other developments:
- Suicide watch. After a brief court appearance Thursday in which Cruz was ordered held without bond, lawyers said he'd been placed on suicide watch, the Washington Post reports. Public defender Gordon Weekes described him as an "emotionally broken young man" who "has suffered significant mental illness, and significant mental trauma."