Cold Case: Blackout

When a fingernail is found at a pool where there was an accidental death, Lily and Scotty re-open the case. The Williams family appears to be the perfect family, but as Lilly and Scotty investigate they find that the family was very dysfunctional. The matriarch who drowned in the pool was stranded with her ex-husband, two children and grandchild during a snow storm. As the investigation continues, it appears that nearly everyone there had a motive to kill her as she held money over her daughter's head and sexually abused her son and attempted to do the same to her grandson.