From the grand jury report:
Joseph V. Paterno testified to receiving the graduate assistants report at his home on a Saturday morning. Paterno testified that the graduate assistant was very upset. Paterno called Tim Curley, Penn State Athletic Director and Paternos immediate superior to his home the very next day, a Sunday, and reported to him that the graduate assistant had seen Jerry Sandusky in the Lasch Building showers fondling or doing something of a sexual nature to a young boy.
Thanks. You're fast.