An American Murder Mystery: The Staircase

When 23-year old Stacey Peterson vanishes, suspicion lands on her police officer husband, Drew. Soon police learn his last wife died under mysterious circumstances.

In 2001, Kathleen Peterson is found dead at the foot of a staircase in her home. At first deemed an accident, police soon suspect the victim's husband.

Prosecutors continue to investigate the Stacey Peterson disappearance. They soon discover a troubling pattern of abuse in Drew Peterson's previous marriages.

Investigators discover that 16 years ago, Michael Peterson's friend Liz Ratliff also died at the bottom of a staircase, lying in a pool of blood.

The defence unveils what they claim is a sought-after piece of evidence. Shock revelations about an expert witness threaten to unravel the entire case.