I don't believe that this is the basis for the movie just because this case happened the same year that this movie came out. But, this case is similar to the movie so here are a few links if you want to read up on Jay Alan Roach and Lorraine Roach case. MSNBC did a segment on the case and showed the video of Jay Alan Roach. He cried like a baby when he was caught.
The Husband and the Hitman
A Link to the video of the husband caught on tape as he tries to hire a hit man