An American Murder Mystery: The Staircase

Investigation Discovery GO
S1 | E3 | Airdate: 04/10/2018
The defense unveils what they claim is a long sought-after piece of evidence that catches the prosecution off guard. The trial drives to an emotional conclusion. New evidence emerges that supports a jaw dropping theory of how Kathleen really died. Then, bombshell revelations about an expert witness threaten to unravel the entire case and give Michael Peterson a shot at freedom.