Mike McQueary Testifies He Saw Jerry Sandusky Having Intercourse With Boy

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Mike McQueary, an assistant coach with the Penn State Nittany Lions, took to the stand to testify against former Penn State officials accused of lying to a grand jury about sexual abuse allegations against former coach Jerry Sandusky on Friday morning.

McQueary, a former graduate assistant, is the only adult witness on record to allege actually seeing Sandusky involved in the sexual abuse of young boys. The assistant coach was called to the stand early Friday morning to explain exactly what he saw Sandusky do and, according to the USA Today's liveblog of the incident, he testified that he witnessed Sandusky involved in actual intercourse with a young boy.

"I believe they were having some kind of intercourse. He moved toward shower and Sandusky separated from the boy. He didn't say anything and left. I was distraught. I was horrified," McQueary said. "I know they saw me. They both looked directly in my eyes, both of them."

McQueary then testified that he told head coach Joe Paterno was happened.

McQueary said over time that evening his decision was to call Joe Paterno and tell him what he saw. When asked why he told Paterno, McQueary said, "He's the head coach and he needs to know what's happening in there," USA TODAY's Audrey Snyder reports.

McQueary is the only known adult that has admitted to the grand jury that he saw Sandusky engaged in the sexual abuse claims, leaving his testimony as a rather key piece of the case against the former Penn State head coach.