An 18-year-old man was arrested on suspicion of burglary after police say he left his homework at the crime scene.

Police in Orem, Utah, say they tracked a USB drive found at the burglarized home to Dallas Naljahih. They say the computer hard drive contained his homework and was in a backpack abandoned in the backyard.

A 75-year-old man and his wife reported their home had been burglarized early Saturday. The husband says he was woken up by a light in his office, and found a man who was looking through a desk.

The suspect punched the man and fled on foot.

Police say Naljahih was found asleep at his house along with evidence connecting him to the burglary. (AP)