TOWSON, Md. — The teenager accused of shooting an intellectually disabled classmate at a suburban Maryland high school was accustomed to firearms in the home and had endured his parents’ contentious divorce, court documents show.

After Robert Wayne Gladden Jr., 15, was taken into custody Monday, police executed a search warrant at the Kingsville home where he lives with his mother and stepfather. According to court records, they found 11 guns, including shotguns, rifles, a 9mm handgun, and two antique pistols.

Police also allegedly found a spent rifle casing in Gladden’s bedroom and collected ‘‘miscellaneous live ammunition’’ from the master bedroom where most of the guns were found. Police also allegedly recovered marijuana.

A bail review hearing for Gladden, who has been charged as an adult with attempted murder and assault, was postponed Wednesday because he was still at a state psychiatric hospital where he was sent for an evaluation. He is being held without bail.

According to Baltimore County police, Gladden used a shotgun to fire at random in the cafeteria of Perry Hall High School Monday morning. Daniel Borowy, a 17-year-old who has Down syndrome, was shot in the back and critically wounded.