Suffolk County Police Commissioner Richard Dormer testifies at a meeting...

Suffolk County Police Commissioner Richard Dormer testifies at a meeting of the Suffolk County Legislature on Thursday, Dec. 15, 2011. Credit: James Carbone

"48 Hours Mystery," which aired an extensive report on the Gilgo Beach serial killings last year, is returning to the story with fresh details Saturday night. (A clip may be available later today, so check back.) The segment focuses on the disappearance of Shannan Gilbert and her remains, which police said may have been found Tuesday in nearby Oak Beach. It airs at 10.

Reported by "48's" Erin Moriarty, this has a new interview with Suffolk County Police Commissioner Richard Dormer, above. But there's more. Here's the full program description: 

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