shirt off, showing his tattoos off to all the guys and then he was showing them off to me. >> would you describe kasey as a jealous person? >> yeah. >> dimauro claims that not long after brewer's arrival, she went out for the evening. >> next thing i know, the police were knocking at the door in the morning, and i answered the door. when i answered the door, they said that we need to come in for questioning for murder. and i was really surprised. and i was like where? who? who got murdered? >> prosecutors say dimauro not only knew about the murder but helped to clean up the blood afterwards, and then covered for some of here roommates who committed the murder. if convicted, ackerman, the alleged ringleader could face the death penalty. but he says he had nothing to do with it. >> we were drinking and i'm saying we were doing pills, smoking pot, just different stuff inside the apartment, and i fell asleep on the couch watching a movie.