. >> there was one spot of blood that belonged to vincent goslen. >> this is bin go. >> this is more evidence than i have had. >> how do you explain the victim's blood on backpack when you're hundreds of miles away? >> you can't. unless you're the person that killed him. >> but pryor knew the case against jessie wasn't as airtight. >> it was very much a circumstantial case because there was no physical evidence implicating her. >> did you worry that wouldn't be enough to get a conviction? >> somewhat, yes. jarred long was not willing to give us anything to help out with regard to implicating jessie. but we knew that it was her involvement that got jarred to where vincent was killed. >> how are you going to prove that? >> with her own words. >> then enter defense attorney mark bryant, he represented jarred long and he had a plan that could benefit jessie too. his strategy was to get jessie's interview with police thrown out, and how would he do that? >> mrs. goslen had told the local police department that she didn't want to talk, that she wanted a lawyer. >> i want an attorney, and i