Unknown interviewee was assigned to AG to establish connectivity of computers. Recalled an incident where an MI explained to an interrogator that a detainee was unavailable for interrogation because he had been interrogated for 10 hrs, stripped naked, was wet and cold and thrown into the back of a truck. Recalled going to the Hard Site once and observing MPs yelling at detainees, making one guy say his name over and over again. Also heard two interrogators had gotten drunk and made a female detainee take off her shirt. Also heard dogs were used to scare detainees. Also heard of detainees being handcuffed in contorted positions. Additionally, the interviewee overheard "MPs were using detainees as practice dummies. They would hit the detainees as practice shots They would apply strikes to their necks. And knock them out. One detainee was so scared. The MPs held his head and told the detainee it would be all right and then they would do the same thing to the detainee. The detainee would plead for mercy. They all thought it was funny."