>> mike garvin had no explanation. >> he said, "i don't know," and he at this point starts to get very agitated. >> he was telling lies, and they were starting to be uncovered. and the more they uncovered, the deeper they found it, and the harder they looked for shirley. >> next, police interviewed mike's co-workers at his real estate office in jacksonville. >> i went to talk to some of his co-workers who did not know that he was married. seemed very surprised to find out that he was married. >> this was particularly surprising since mike and shirley had been married for close to 16 years. when police searched the garvins' home, they found no signs of foul play. all of shirley's clothes and personal items were still there. crime scene technicians used luminol in every room of the house, but it turned up nothing.