so i've got a phone call from the tiki lodge. i can't identify what room it came from. >> the motel had 30 rooms. almost all were occupied on the day of the murders. detectives began the painstaking task of trying to identify all of the tenants. >> for the most part, it was people just passing through. the registration cards didn't have date of births, so you're looking at very common names. >> and most of the hotel guests paid in cash. another dead end. so investigators had to return to the scene of the crime in the hopes they might have missed something. >>> based on the evidence, police suspected that their killer called real estate agent roxanne ellis from the tiki lodge motel and asked her to show him the vacant unit at the sheraton court apartments. this meant the killer was familiar with the building and knew the apartment was vacant. he didn't give his name, and roxanne either knew him or didn't ask for it. around 11:00 a.m., roxanne showed the apartment to the killer. what happened during that time was unclear, but roxan