he saw Sandusky with a boy in a sexual situation. Pattern did the right thing by telling his superiors then never following up on it. During all this, Sandusky had free reign in the football building.
People who worked in the football office have said that they could not change the color of their carpet or wall hangings without Paternos approval, but somehow he couldn't kick Sandusky out of the building after he knew he raped a boy.
It all makes perfect sense. He's innocent.