A 17-year-old boy is in critical condition at a Maryland hospital after being shot in the cafeteria of Perry Hall High School near Baltimore on Monday, the first day of classes.
The suspected shooter is 15-year-old Robert Wayne Gladden Jr., who was arrested at the scene. Here's his last Facebook post:
According to reports, Gladden walked into the school cafeteria and fired his gun three times, hitting one student in the back before being tackled by a teacher and a guidance counselor. The student who was shot is believed to have Down syndrome.
Early Tuesday morning, officials released Gladden's name after making the decision to charge him as an adult. The 15-year-old boy now faces charges of attempted first-degree murder and assault.
Gladden's father later told reporters that his son had been bullied. His Facebook page offers a brief but haunting portait of a troubled teen.
Long before news media could confirm the shooter's name, students at Perry Hall High School identified him on Twitter.
One of Gladden's Facebook friends — whose profile picture was of him and Gladden, and whose account has since been deleted — posted an apology to his friend.