the state's star witness, robert mullens. witness i call the jailhouse snitch, and you call a jailhouse informant. >> no, he's a snitch, no question about that. but at the end of the day, what we learned from robert mullens is that he's been given a fairly detailed account by gagnon of what occurred that evening and what the crime scene looked like. >> in fact, he said mullens was the first to tell police this piece of bombshell news. gagnon had mentioned an accomplice in the killings. >> the only way he can have that information is from someone who knew the crime scene, participated in the crime. >> then the prosecutor tried to spin an inconvenient fact in his favor. those mystery blood drops found at the murder scene had been tested. the dna was not a match to rick, but to an unidentified male. that, said the prosecutor, actually supported what mullens said, that rick had an accomplice. humphries believed the evidence was enough to put the defendant away. he only wished he could make the same case against rick's old girlfri