they knew rachel cancelled the friday meeting with dan hallie about the stalking incidents.etectives could find no activity since a voicemail friday night. that meant rachel had been off the grid nearly three days. >> i knew there was something very, very wrong. >> reporter: you swung into action. >> i had about 1,000 fliers printed at staples. >> reporter: monday afternoon, law enforcement pinged rachel's cell phone and got a weak echo just across the snake river from her home. >> we got a lot of people out into that field that night. also used a blood hound to do a live search. >> reporter: the search was futile. early the next day, tuesday, captain hallie formed a region missing person task force. what's on the white woboard, th agenda? >> william slim. >> the ex boyfriend. >> other ex-boyfriends, ex husbands. there are a neighbor that had suspicious behaviors. he had asked rachel out on a date and she turned him down. he left town quickly. >> that's suspicious. >> checking hospitals, travel information. we checked every bus ticket that was sold that weekend. >> reporter: