NBC sportscaster Bob Costas says he now believes there is “legitimate doubt about the extent of Paterno’s involvement” in the Jerry Sandusky scandal.

Costas appearing on the Tonight Show with Jay Leno last night, said the main figure in the scandal, outside of Sandusky himself, is Joe Paterno. While expressing doubt about Paterno’s involvement, Costas isn’t sure where “the truth is.”

And the veteran sportscaster isn’t giving Paterno a free pass. Costas says he thinks Paterno was negligent and should have recognized what was going on. But having read the Freeh Report, Costas says, “I don’t buy the idea that he was actively involved in the cover up.”

Costas says Paterno did what he was supposed to do by reporting it to his superiors, but that Paterno did the minimum. “He should have followed up. He was Joe Paterno. He had respect and power. And if he had followed up and pushed further, then maybe some of this would have, you know, kind of come to resolution before more kids were victimized.”

Watch the entire Costas interview: