Posted in Uncategorized ‘The Staircase’: Todd Peterson Once Claimed His Father Michael Peterson … The 2001 death of Kathleen Peterson and Michael Peterson’s court case are the subject of HBO Max‘s The Staircase.At the time, most of Michael and Kathleen’s kids rallied around the patriarch … https://www.cheatsheet.com/entertainment/the-staircase-todd-peterson-claimed-father-michael-peterson-serial-killer.html/