"Their Killer Affair" (a.k.a., "Deadly Exposé") features an interesting lead character in Detective Maxine "Max" Payton, who is described early in the film as "the pig-faced chess king" perhaps because she knows how to skillfully maneuver the pieces on a chessboard.

Working in homicide, Max is on the trail of a serial killer who leaves charms on the deceased victims. One is an image of swirling circles. Another is a pre-Celtic spiral. Yet another is related to the Hindu "perfect" sound of "ohm." Max is currently living with Simon Jacobson, the former star lacrosse player in college. Simon is Max's "rebound" relationship after her failed marriage to the cheater Ryan Curio.

After Ryan becomes one of the serial killer's victims, it becomes clear that the killer is close to Max. He has cleverly targeted men and women associated with betrayal of the their spouses, finding the victims on Adeline Lilly's website of unfaithful partners.

While there were some interesting character interactions, those close to Max were all unsavory people. Max's bestie Jen has been hitting on her live-in boyfriend Simon. Jen and her unfaithful husband Greg, who is ironically a hot-shot divorce attorney, get into a fist fight in her dress shop. Even Curtis, Max's partner on the police force, seems oily.

The major weakness of the film was in the unraveling of the narrative to expose the Charm Killer. The plot seemed strained when all of the major candidates just happen to show up simultaneously at a trailer park. Even the motivation of the killer in targeting people close to Max seemed underdeveloped. Why the killer was so obsessed with Max was a conundrum never fully explained in this deadly exposé.

This is a whodunit Lifetime movie with a detective (Melissa Archer) in the starring role out to solve a bunch of serial killer murders. She begins to discover some patterns to all of them and has herself and us wondering who the culprit is. Would have given this more stars except that it speeds up too much at the end. All in all, not a bad thriller but wouldn't recommend it, either

Another case of unnecessary rumbling "background music" drowning out the dialogue. Doesn't anyone who makes these things ever watch the finished product? Thank god for subtitles and rewind. Without them, I would never be able to understand the plot.