A new accuser has sued Jerry Sandusky, Penn State and a charity the former assistant coach founded, claiming he was sexually abused about six years ago, according to Reuters.

The case was filed in Philadelphia last month by Williamsport attorney Bret Southard, whose client was identified only by his initials, The Centre Daily Times reported, Reuters reported.

The lawsuit claims Sandusky abused the boy during a shopping trip in 2008 or 2009, and after they attended a Penn State game in 2008 against Coastal Carolina University, according to Reuters.

The trip would have come around the time law enforcement officials began investigating Sandusky in late 2008, based on a complaint involving a student in central Pennsylvania, Reuters reported.

They charged him in 2011 and Penn State previously settled 26 cases for nearly $60 million, according to Reuters. Sandusky was convicted two years ago of sexual abuse of 10 boys and is serving a lengthy state prison sentence.

The lawsuit said the accuser was among the boys listed as Second Mile participants on a document taken from Sandusky's home during the investigation. Some of the names had check marks next to them.

Southard told the newspaper his client represents a new case, according to Reuters. The lawsuit seeks $550,000, along with punitive damages and interest.

The lawsuit describes the boy as a participant in The Second Mile, the charity for at-risk children Sandusky founded, the newspaper reported, Reuters reported.

Second Mile official David Woodle said the charity would "engage with them and try just to understand what's there and take it through the legal process," according to Reuters. He said The Second Mile now exists only as the owner of real estate that is currently for sale.

"There was such a mark next to plaintiff's name, Reuters reported.The (state police) then contacted (his) parents," the lawsuit said.