Adam Pitman of Keokuk is trying to block several pieces of evidence from being considered in his murder trial, which is scheduled for May 22.
Pitman is accused of killing his mother, Rosa Pitman, at her home at 1602 Concert Street in Keokuk on August 30, 2011. The state medical examiner ruled that Rosa Pitman was strangled.
Adam Pitman was pulled over by Fort Madison police at about 5:45 AM that morning for having no working tail-lights. Authorities say he admitted to killing his mother at that time.