detectives were now convinced that tim permentor, the boyfriend who pledged to help solve karen's murdering him because of his criminal record. >> i didn't do it. i knew somehow, some way i was going to get it pinned on me. i knew the minute i saw the body. >> detectives arrested him and sent him to county jail. bill lowry was the state prosecutor who got the case. what about your accused, timothy permentor? who is he? >> he is a psychopath, someone who i think had gotten lucky to be with karen. once she got past the superficial aspect of him and realized what he really was like, she wanted out of that relationship, and that ultimately led to her death. >> prosecutor lowry said permentor thought he could outsmart the cops by playing the bereaved boyfriend, playing to the hilt at the crime scene. >> oh, god! >> the prosecutor said permentor got thrown off the tear-stained script when he called karen's best friend soon after making the 911 call. >> he said katherine, it's tim. i'm a karen's apartment and she is laying on the floor and there is blood everywhere. she has been stabbed. >> sta