What did Joe Paterno know and when did he know it?

According to an explosive new CNN report published Saturday, there is now even more evidence the legendary ex-Penn State football coach may have known about Jerry Sandusky's sexual abuse of young boys years before Sandusky's 2011 arrest.

CNN obtained a Pennsylvania police report that described Paterno's reaction to whistleblower Mike McQueary showing up in his office in 2001 and telling Paterno that he had witnessed Sandusky engaged in "an extreme sexual act" with a young boy in the football locker room.

The new report describes what happened after McQueary told Paterno what he had witnessed.

"Then he made the comment to McQueary this was the second complaint of this nature he had received about Sandusky," the report obtained by CNN states. The report is based on McQueary's version of the 2001 meeting.

McQueary, according to the police report obtained via a source by CNN, reported that Paterno appeared to tear up at the news.

McQueary - a former Penn State quarterback and a graduate assistant coach at the time - was a key witness in the case against Sandusky. Sandusky was convicted in 2012 of sexually abusing 10 boys over 15 years. He's serving a prison sentence of 30 to 60 years.