sometimes it's at the same level. >> you're looking at security cam video of joe labella, a former detective turned private investigator and susan williams, a mother of four from the tony community of garden city, new york. at a diner near her home. it's here while her neighbors order cheeseburgers and platters that susan asks labella to kill her estranged husband peter. >> this was something i really wasn't prepared for. >> after contacting the nassau county district attorney's office, labella introduces susan to an undercover detective posing as a hitman. >> hi, susan. >> nice to meet you. >> i said to the detective if she feels like she can trust you, then she'll open up and talk to you. if she doesn't, then she might get out of the car and walk away. >> on march 3rd, 2010, in eisenhower park in the town of east meadow, the camera rolls as