When Mari Gilbert's daughter Shannan disappeared, she demanded answers.  Shannan was last seen on a 'date' with someone who'd placed an ad on Craigslist.  After receiving a mysterious telephone call, Mari realized Shannan was missing - but police were disinterested in the case because she'd been working as an escort.

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Mari Gilbert - played by Emmy-winning actress Kim Delaney - became a mom on a mission  ... a mission to find her daughter.  

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She ended up exposing an unknown series of serial killings in which as many as 16 women's bodies were found in shallow graves near Long Island, New York beaches.

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The film, inspired by real life events, is Lifetime Television's 400th 'ripped from the headlines' movie. Joining Kim Delaney is Eugene Clark as private investigator "Herc" Zinneman; John Cassini as Detective Varrone; Patrick Sabongui as Police Chief James Burke; and Jason Gray-Stanford as Joel Rubin

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The Long Island Serial Killer: A Mother's Hunt for Justice is produced by Lighthouse Pictures, with Sony Pictures Television distributing.  Executive producers include Emmy®  Award winner Deborah Norville and Peabody Award winner Elizabeth Stephen. Directed by Stan Brooks, the script is written by John Pielmeier.