HILLSBOROUGH COUNTY, Fla (News Channel 8)-The Hillsborough County State Attorney's office has decided it will not prosecute Vickie Rock for shooting and killing 56-year old Daniel Robertson. Investigators say Robertson was attacking his girlfriend at a Brandon apartment complex in August when Rock intervened. "I hear her, a woman screaming, somebody please help me. Please help me. He's killing me. He's killing me. Over and over again." Said Rock. "He was killing her. Was I going to stand there and let him kill her? Or was I going to do something? I did something."