in shirley's name. >> to me, it appeared that she was financially stable and he was financially in trouble. >> it wasn't until shortly before she disappeared that i ever heard her say anything even remotely unkind about him. >> and friends told police that shirley was planning to leave mike. >> she felt that he was financially irresponsible. shirley said that she was planning to leave the area and mike would not be going with her. >> to keep tabs on mike's whereabouts, police secretly put a global positioning satellite receiver underneath his car. these days, police no longer follow suspects. satellites do it, instead. >> it is recording constantly and sending a beacon back to a computer, which allowed it to be tracked at all times and allowed for covert surveillance of michael garvin. >> about six weeks after