A troubled student whose disappearance with a rifle case on Monday led his college in Maryland to shut its doors until the end of the month was found dead from a self-inflicted gunshot Saturday at a bird sanctuary in Pennsylvania, the police said.

The student, Jacob Marberger, 19, left his home in Cheltenham, Pa., a suburb of Philadelphia, on Monday with a rifle case, his parents said, and he had not been seen or heard from since. The police said they did not know whether Mr. Marberger had a firearm with him or had simply left home with its empty case.

He was found on Saturday afternoon by a park employee in the picnic area of Hawk Mountain Sanctuary in Kempton, Pa., along with a green Land Rover that he was believed to have been driving, according to the Pennsylvania State Police. The police said it was not clear how long his body had been in that location, about 70 miles from his home.

Mr. Marberger, was a sophomore at Washington College, a small liberal arts institution in Chestertown, Md. Last month, he was accused of drunkenly brandishing an antique pistol at a party on the campus. The episode set off repercussions that were said to have left Mr. Marberger despondent.