Watch Keith Morrison Investigates

Who is Donnie Rudd? War hero? Casanova? Big time lawyer? Brilliant scientist? Secret agent? Some say he's a con man. Police say he's a killer. He says he's innocent. Keith Morrison investigates a decades-long saga of love, death and suspicion.

In 2012, Dateline NBC correspondent Keith Morrison nationalized the heartbreaking case of Angie Dodge, an 18-year-old woman murdered in her home in Idaho Falls, Ind. Two decades ago, police arrested an acquaintance of Dodge, 20-year-old Chris Tapp, after he confessed to participating in her murder. In the years since Tapp's conviction, hours of video documenting his interrogations with police were made public and ignited a firestorm of controversy over whether the confession that led to his life sentence for murder was false and coerced. The Idaho Falls Police Department denies the allegations and stands by Tapp's conviction. But in a surprising twist, Angie's own mother, Carol Dodge, became one of Tapp's greatest advocates and was at the helm of the fight for his exoneration as part of her ongoing mission to find the man who killed her daughter.Morrison's original reporting sparked nationwide interest in Tapp's case and inspired an outcry from advocates calling for Tapp to be freed. I

Keith Morrison investigates the horrific 1994 murders of Joann Katrinak and her infant son Alex, the tangled relationships surrounding the crime, and the ongoing claims that Patricia Rorrer was wrongfully convicted.