. >> he asked if i was aware of an individual by the name of barry beach, wanted to know if f-beach was or ever had been a suspect in a homicide in roosevelt county. >> reporter: barry was almost 21 by then. he had gone to louisiana to be with his father and stepmother. it wasn't going well. in fact, his stepmother had him arrested for helping his stepsister skip school. and then told arriving police officers that barry was once questioned about the murder of kim nees in montana. well, it just so happened investigators in louisiana were scratching their heads over the murders of three women in their own county, so could beach be their killer? >> my feeling from talking to sheriff mallum was the fact that he was a viable suspect. >> reporter: so jay vy, the detective who called the montana sheriff interrogated beach about the louisiana murders. >> what made you think that he was the kind of guy that could be your prime suspect? >> the fact that he was a suspect in a murder already. >> so the detective put barry in a little room here at the sheri sheriff's office and grilled him. for two