he lived in the town near sodus.ers even remember him consoling her after the murders. all this though, unofficial murder. >> he was there the whole time we were doing vigils for my brother. and having getting togethers at our house. >> so here is a theory. if charlene did in fact have this explosive relationship with josh. maybe her current boyfriend, this casey, had even the score by killing josh as a demented lovers gift. >> what role does he play in this? >> he plays a pity her vital role. >> police say that casey was a person of interest. he also had a scrape with the law. he and charlene dated when she was just 14 and he 19. >> they had known each other in the past. casey had actually been arrested in the past for having a relationship with charlene when she was under age. >> casey was on the list. someone detectives wanted to speak to and right away. >> we reached out to him, and brought him in for an interview. which he complied, 100%. and told us that he was just the boyfriend of charlie. and he didn't know