STATE COLLEGE — The death of a Penn State student whose body was found in a stairwell has been ruled an accident, though police are investigating whether alcohol was involved.

Joseph Dado, 18, of Latrobe, died of head trauma, Centre County Coroner Scott Sayers ruled after an autopsy Tuesday. Dado's body was found by maintenance workers at the bottom of a concrete stairwell of a campus building Monday evening. Police suspect Dado may have fallen about 15 feet from a retaining wall.

He was last seen about 75 yards away, leaving the Phi Gamma Delta fraternity house about 3 a.m. Sunday. A toxicology test will be performed on the body soon, but results will not be known for several weeks, university spokeswoman Lisa Powers said Tuesday.

The school said in a statement that police were continuing their investigation, including whether someone provided Dado with alcohol or illegal substances, and whether alcohol was given to him while he was at the fraternity.