>> what did you learn about? kimberly >> i just knew that she was a doctor. >> kimberly advertiser business online, and cindy found the ad. she instantly sends that this was another victim. at the same time, someone else was on derrick's trail. sheriff -- he'd gotten a call from the manager of the st. paul hotel. >> that's our finest hotel in st. paul, it's cater to presidents. there is a problem with the guest, the man seen here in the security video. i believe -- to preregistered the room, the credit card was eventually declined. he said he was a doctor, and told him he'd give them another credit card. but he claimed the airline had lost his luggage. >> and he said, well, my wallet is in my luggage, is it okay if we just check in. the clerk gave him a room. of course, the man checking in is derek alldred. >> he followed up with us manager and said he'd be able