>> absolutely. >> ken barnes. a new name. had no idea how he might fit into his investigation. but he did know of barnes. >> as soon as we heard the name, investigators, state police definitely knew, erie police definitely knew ken barnes was a crack dealer in town. >> marjorie and ken barnes, it turned out, had been friends for many years. they were fishing buds at a local pier. clarke started tailing barnes. >> you go after him. >> we did and there were several times where we would have to sort of track ken down. and say, hey, ken, get in the car. let's chat. >> but that's all it was. a chat. barnes gave him nothing. so clarke did a deep dive on the guy's contact with the authorities. and ta-da, there it was. a video. >> on camera is kenneth eugene barnes. >> a police interrogation of ken barnes had been conducted by the erie police almost two years before. at the time, they were investigating the frozen body case. >> marjorie diehl, you known her how long? >> almost nine years. >> barnes had a grand slam revelation and it

ken barnes. these people are criminals. >> if ryan is innocent, you have a murder case. >> it is murder. i don't say the word, killed. he didn't pass away. he was murdered. >> meanwhile, filmmaker, trey, kept working. he had a documentary to make and scored two big interviews. one was with marjorie. she spoke via skype to trey and an attorney. still denying as only marjorie could that she'd had anything to do with the bank robbery. she said the prosecution's motive was laughable. >> here i am, i killed two boyfriends, self-defense, but i killed two boyfriends, right? would i have to hire ken barnes to kill my father if i hated my father that much or wanted him dead or would i do it for free myself? come on. >> it's on my resume. >> yeah. >> i killed them. >> yeah. >> trey decided to call his movie "evil genius" with marjorie in mind. but it was the question of brian wells' role that started to consume him. eventually, he came to the same conclusion that the wells family had since day one. >> i do