detectives robert fitzgerald and peter louzan were assigned to the case. >> the thing we needed to dokensy's cooperation. >> reporter: since the woman trusted marckensy, detectives wanted him to keep playing the role of the bad guy. he didn't hesitate. that's got to be really daunting. >> it was kind of cool you know in a way. you know, that's like 007 type thing. >> reporter: detectives then devised a plan. they rigged his car with cameras and audio recording devices. >> the microphone was hanging over here, and under my seat here i had a phone. >> reporter: and they asked marckensy to set up another meeting with the woman. the location, this large walmart parking lot directly across the street from the police station. we can literally see the police department? >> yeah. i mean, you can throw a rock and hit the police station from here you know. >> reporter: marckensy, the newly minted informant, alerted the police the meeting was set. >> all units. >> reporter: a team of detectives raced to the parking lot to get in position. >> it's an intense moment because we -- you know, the cas