‘I believe there was evidence that the guy who saw Sandusky in the shower with the little boy told Joe Pa.... ‘
yes, McQueary told Paterno; at that point in time, Sandusky no longer reported to Paterno...
‘As to how long he knew, I don’t know.’
he was clearly aware of rumors concerning Sandusky’s predilictions, and from McQueary’s description of Paterno’s reaction, I suspect he then realized that the rumors were evidently true...
He knew when he retired. He knew that Sandusky was qualified to be a head coach somewhere.