Read More: Penn St. Nittany Lions

Jerry Sandusky, who's been hit with dozens of charges of child sex abuse, many of them for acts committed while on Penn State's campus and some for acts committed while on the clock, maintained a presence at Penn State up until his arrest, Yahoo! Sports' Dan Wetzel reports.

Wetzel cites multiple sources as saying Sandusky was "working out multiple times" in the Nittany Lions' Lasch Football Building in the days leading up to his arrest.

Penn State banned Sandusky from bringing children on campus after the second allegation was raised against him in 2002. But within five years, he was apparently no longer banned.

Sandusky maintaining such a presence in Happy Valley means he had to have come in rather frequent contact with both coach Joe Paterno and assistant coach Mike McQueary -- the former graduate assistant who reported Sandusky's alleged assault to Paterno in 2002.

This story started out as revolting and has gotten worse by the hour. And it's nowhere near done.

For more on the Nittany Lions, visit Penn State blog Black Shoe Diaries. Follow along here for updates on the Jerry Sandusky case.