The accused Henning postal shooter says police forced him to confess. Chastain Montgomery wants his videotaped confession to be inexcusable as evidence in his pending trial.

He has plead not guilty to charges he and his 18-year-old son killed postal workers Paula Robinson and Judy Spray after robbing the Henning Post Office in October of 2010.

Montgomery's defense attorney says there are several constitutional violations including his client not being on anti-psychotic medication. His attorney also says they intend to use a mental health evaluation to show that Montgomery is mentally challenged.

A trial date has yet to be set.