An American hero was shot to death while withdrawing lunch money for his kids. Who killed the young naval officer? It turned out to be a murder-for-hire case, plotted by Cory Voss' wife, Catherine, who sent a hitman to kill him in what prosecutors said was supposed to look like a botched robbery. It was such a haunting case it's featured on "NCIS: The Cases They Can’t Forget." It’s a true crime show and a spinoff of the hit CBS drama.