

Investigators discover novelist Michael Peterson clutching his dead wife Kathleen, in a pool of blood at the bottom of their back staircase. Michael insists that her death is the result of a tragic fall, but investigators believe otherwise.
Investigators are stunned to discover that sixteen years ago, Michael Peterson's good friend Liz Ratliff also died at the bottom of a staircase, lying in a pool of blood. The trial begins and experts battle over the interpretation of blood spatter.