A Pennsylvania prison guard has been arrested on allegations of sexually or physically assaulting more than 20 prisoners and trying to cover up his crimes. Harry Nicoletti faces 92 charges for acts against inmates under his watch, including rape, threats, and using some prisoners to target others by having them contaminate bedding and food with bodily fluids. His alleged victims include a transsexual prisoner who has accused Nicoletti of rape and shouting racial epithets. Nicoletti has denied the charges, and his union has offered its support, saying prison guards are often falsely accused.