A quote from an article in the Washington Post:
The information of Schianos alleged knowledge came to light in the unsealed court testimony of former PSU staffer Mike McQueary. Heres a passage from the report
Former Penn State assistant coaches Greg Schiano and Tom Bradley knew that Jerry Sandusky, their colleague on Joe Paternos football staff, was acting improperly with young boys years before law-enforcement authorities were first notified, according to testimony from former Penn State assistant Mike McQueary that was unsealed Tuesday by a Philadelphia court.
McQueary, who testified in Sanduskys 2012 criminal case that he had told Paterno of seeing Sandusky rape a boy in 2001, said in the 2015 deposition that he had briefly discussed with Bradley what he had seen.
He said another assistant coach had come to him in the early 90s about a very similar situation to mine, and he said that he had  someone had come to him as far back as early as the 80s about seeing Jerry Sandusky doing something with a boy, McQueary said.
According to McQueary, Bradley identified Schiano, now the Ohio State defensive coordinator, as the other assistant. In response to a question about whether Bradley had shared details of what Schiano had said, McQueary related a conversation with Bradley.
No, McQueary replied, according to the documents, only that he had I cant remember if it was one night or one morning but that Greg had come into his office white as a ghost and said he just saw Jerry doing something to a boy in the shower. And thats it. Thats all he ever told me"
McQueary added that he didnt know whether Bradley, now UCLAs defensive coordinator, had reported the incident, which he said happened in like 2005, 06; it could have been anywhere in there.