Read More: Penn St. Nittany Lions

Current Penn State assistant coach Mike McQueary has been identified as the unnamed 28-year-old graduate assistant the Pennsylvania Attorney General described witnessing former defensive coordinator Jerry Sandusky sexually abusing a young boy in the showers of Penn State's athletic facility, according to PennLive.com. 

McQueary told Joe Paterno what he witnessed, and Paterno informed athletic director Tim Curley and university vice president Gary Schultz.  Curley and Schultz then waited 10 days to speak with McQueary, ultimately deciding not to report the incident to the police.

When Curley and Schultz were questioned about the meeting by a grand jury, their accounts of the conversation differed greatly from those of Paterno and McQueary. From PennLive.com:

Their testimony of what happened in 2002 -- when now-assistant coach Mike McQueary said he witnessed Sandusky in a sex act with a boy in a shower -- contradicts that of Paterno and McQueary.

In the presentment, jurors wrote that McQueary -- identified in the presentment only as a 28-year-old graduate assistant -- was credible but Schultz and Curley were not.

Several sources have identified that witness as McQueary.

Curley and Schultz deny they were told that McQueary witnessed a sex act, instead claiming they were told Sandusky was "horsing around," and that the incident was "not that serious." They have been charged with perjury and failure to report. Sandusky, meanwhile, faces dozens of sex crime charges, and if convicted will face life in prison.