Perry Hall High School Shooting

Robert Wayne Gladden, the teenager accused of shooting an intellectually disabled classmate at Perry Hall High School in suburban Maryland was accustomed to firearms in the home and had endured his parents' contentious divorce, court documents show.

A 15-year-old sophomore at a suburban Baltimore high school who made references to murder-suicide on Facebook has been charged as an adult in the shooting of a classmate on the first day of school, authorities said Tuesday.

Fifteen- year-old Robert Wayne Gladden Jr., charged with 1st degree murder in the shooting on the first day of classes at Maryland's Perry Hall School, had a disturbing Facebook page in which he describes his occupation as "murder suicide at The Manson Family."

A 15-year-old student opened fire on the first day of classes Monday at a Baltimore County high school, getting off two shots and wounding a classmate before being rushed by teachers, authorities said.