GENARO C. ARMAS
Associated Press

BELLEFONTE, Pa. (AP) -- Jurors in Jerry Sandusky's trial are hearing about the alleged sexual abuse of a boy whose identity is unknown to prosecutors.
    
The testimony began Wednesday afternoon after the judge ruled that co-workers can tell the jurors about what a janitor reported seeing in the Penn State showers.
    
The janitor, Jim Calhoun, has dementia and isn't able to take the stand.
    
Ron Petrosky says that when he encountered Calhoun in a football team locker room more than a decade ago, the janitor told him he'd seen Sandusky making a boy perform oral sex on him.
    
Petrosky says Calhoun's face was white and his hands were trembling.
    
The 68-year-old Sandusky, a former Penn State assistant football coach, is fighting 52 criminal counts for alleged abuse of 10 boys over 15 years.

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