Tom Maher

Investigators discover novelist Michael Peterson clutching his dead wife, Kathleen, at the bottom of their back staircase; Peterson insists her death is the result of a tragic fall, but investigators believe otherwise.

Stunned investigators discover that Michael Peterson's friend, Liz Ratliff, was found dead at the bottom of a staircase 16 years ago; the trial begins with experts battling over the interpretation of blood spatter.

Michael Peterson's defense unveils a long sought-after piece of evidence, catching the prosecution off guard; bombshell revelations about an expert witness threaten to unravel the entire case and give Peterson a shot at freedom.