>> ken barnes, a new name.ew of barnes. >> as soon as we heard the name, investigators, state police definitely knew, erie police knew ken barnes was a crack dealer in town. >> reporter: they had been friends for many years. they were fishing buds at a local pier. you go after him. >> we did. there were several times we would have to sort of track ken down. and say, hey, ken, get in the car, let's chat. >> reporter: but that's all it was. a chat. barnes gave him nothing. so clark did a deep dive on the guy's contact with the authorities, and there it was, a video. >> kenneth eugene barnes. >> reporter: a police interrogation of ken barnes has conducted by the erie police almost two years before, at the time they were investigating the frozen body case. >> marjorie diehl, you know her how long? >> almost nine years, yeah. >> reporter: barnes had a grand slam revelation and it concerned marjorie. he told investigators she was obsessed with her inheritance. her wealthy mother had already died, and she was upset he