Joe Paterno appears to have played a greater role than previously known in Penn State’s handling of a 2001 report that Jerry Sandusky had sexually assaulted a boy in a university shower, according to a person with knowledge of aspects of an independent investigation of the Sandusky scandal.

E-mail correspondence among senior Penn State officials suggests that Paterno influenced the university’s decision not to formally report the accusation against Sandusky to the child welfare authorities, the person said. The university’s failure to alert the police or child welfare authorities in 2001 has been an issue at the center of the explosive scandal — having led to criminal charges against two senior administrators and the firing of Paterno last fall.