who would want to murder pretty wendy trapaga? did her killer meet her at the sexual swapping club that her boyfriend michel escoto took her to? the cops ran down those leads, and the swingers club theory went nowhere. what about yolanda, the husband's ex-girlfriend, enraged, perhaps, to be traded in for wendy, the younger model? the detectives'guts told them yolanda knew way more than she was saying. but if so, how to crack her? and then there was the husband himself. they kept going back over their notes from the 14-hour interview with him. at times, it had been pulling teeth. >> once we asked him over and over again is there anybody with a motive, anything, anything at all, anything you can tell us? i bring up the point, don't you have a life insurance policy? he says, yeah, we do. >> a hefty one, it would seem, for a healthy 21-year-old woman he wasn't even married to at the time of purchase. >> i asked him, how much is the life insurance policy? and he said a million dollars. and i said a million dollars? and you don't think