What Was Happening on That Back Staircase?

Michael peterson told us he'd come upon unimaginable, his wife, kathleen, at the bottom of their back staircase. E m t saw michael cradling his wife, weeping so hard he had to be pulled away. What had happened on that back staircase now pulled in blund? The answer would be in the eye of the beholder what a husband called an accident, an investigator would see very differently.