I Am Cain: True Crime (Unabridged‪)‬

Newlyweds Nancy and Richard Langert were shot to death in their basement on the evening of April 7, 1990.

Nothing was stolen, no clues were left behind - except for a brief, illegible message Nancy had scrawled in her own blood as she lay slowly dying.

It was a brutal crime without meaning or motive, baffling the FBI and seven local police departments for many months as they explored every possibility- from IRA assassination to mafia hit. But it was a tenacious Illinois policewoman who would ultimately unmask the Langerts' killer - exposing a terrifying, true-life horror that was totally unexpected...and frighteningly close to home.