Greg Schiano is now the defensive coordinator at Ohio State. USATSI

Documents unsealed by a Philadelphia court on Tuesday unveiled testimony that former Penn State assistant coaches Tom Bradley and Greg Schiano knew of Jerry Sandusky abusing boys.

The testimony came in 2015 from ex-Penn State assistant Mike McQueary, who was a key witness in the Sandusky criminal case because he reported to Paterno seeing Sandusky rape a boy in 2001.

In his testimony, McQueary said at some point he "briefly" discussed with Bradley what he had seen. Bradley, who is currently UCLA's defensive coordinator was a Joe Paterno assistant from 1979 to 2011 and replaced Sandusky as Penn State's defensive coordinator.

"[Bradley] said he knew of some things," McQueary said. "... 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 to come to him as far back as the early '80s about Jerry doing something with a boy."

McQueary said Bradley identified the other coach as Schiano, the former Rutgers and Tampa Bay Buccaneers coach who is now the Ohio State defensive coordinator.

When asked whether Bradley provided any details about what Schiano reported to him, McQueary replied, "No, only that he had -- I can't 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 that's it. That's all he ever told me."

Schiano denied any knowledge of abuse in an official statement on Tuesday: "I never saw abuse, nor had reason to suspect any abuse, during my time at Penn State," he said in a statement released by ESPN's Adam Schefter on Twitter.

Bradley responded as well with a statement through his attorney as sent to CBS Sports' Jon Solomon.

"At no time did Tom Bradley ever witness any inappropriate behavior. Nor did he have any knowledge of alleged incidents in the 80's and 90's. He has consistently testified as such," the statement read. "Any assertions to the contrary are false. When he became aware of the 2001 incident it had already been reported to the University administration years earlier."

McQueary placed the date of his conversation with Bradley sometime in the mid-2000s, "meaning like 2005, '06; it could have been anywhere in there." McQueary said he did not know whether Bradley reported the incident witnessed by Schiano to anyone.

McQueary said both he and Bradley complained to each other that Sandusky had access to Penn State facilities. "Tom was kind of a -- yeah, he would be upset and frustrated about that, like I was," McQueary said.

Also revealed in the court documents released Tuesday was that Paterno allegedly knew of Sandusky's abuse as early as 1976.