When acupuncturist Jon Tokuhara is shot dead in his clinic, investigators uncover a tangled love life and several persons of interest -- until security video reveals an unexpected suspect.

The quiet community of Chevy Chase, Maryland is shaken when wife and mother Leslie Preer is found murdered in her shower. Detectives find plausible suspects quickly, but without evidence the case goes cold until a surprising lead unmasks the killer two decades later.

INTERVIEWS WITH: Leslie's siblings and daughter Lauren Preer, Montgomery County Police Officer Jim Barnett, Detectives Ed Golian, Tara Augustin and Alyson Dupouy, Leslie's boss Brett Reedy and others