He follows the noise outside

The entire place seemed to be deserted. No guards, no students, not a living thing as far as his eyes could see. The noise got louder and louder as he wandered carelessly into the freezing night. "It's from the OCTA", he said to himself. There couldn't be any where else that the noise guided him. He stepped into the building like it was his bedroom, only to find the guard asleep on the table at the entrance.

He proceeded into the complex without bothering the guard

He tapped the guard on the shoulder to get his attention