placing drugs on his coca-cola truck and through his route, they were being taken off of the truck. i said, wow. i said, that's pretty serious. and she says, yeah. >> interesting. >> very. >> to detective velasquez, that sounded like a made-up story, almost as if she was trying to divert suspicion away from someone. an ex-wife would qualify, of course, as a person of interest in this kind of case, but as velasquez and we learned, barbara had an alibi. she wasn't anywhere near florida, she said, when david disappeared. >> i was not in florida. i was in arizona, in the apartment. i was nowhere around here. >> and lacking any further evidence, detective velasquez was stalled, dead in the water. unless, maybe the man barbara was married to at the time knew something, michael wolfe. a little checking revealed wolf