no, burbridge wondered, did she hire him?ives kill husbands. >> but then they heard a curious story from a neighbor. that very evening for a couple hours before the shooting a mysterious white van was parked just across the street from the carliles' house. >> 911, what are you reporting? >> now they just came back and are sitting there. and i'm really freaked out. >> of course, in many if not most neighborhoods in america, a parked white van might not attract a bit of attention. >> maybe it's paranoid, but it's bizarre that it's in this neighborhood. >> this is the south hill after all. nondescript white vans don't just show up here. and the neighbor noticed and doug carlile ends up murdered. >> we didn't know if it was related or not, but it was something we considered immediately. >> and again, this being the south hill, another neighbor had the wherewithal to provide a special kind of help. >> a homeowner had a video camera that covered his driveway and we picked up the van two hours before the murder. >> here is the video