Debra Milke, then a 25-year-old insurance company clerk, was accused of dressing her son in his favourite outfit and telling him he was going to see Santa Claus at a local mall. Four-year-old Christoper Milke was then taken by two men to a desert area north of Phoenix where he was shot three times in the head. The original trial in 1990 found Ms Milke guilty of arranging the killing, based largely on an alleged confession made to Detective Armando Saldate. However, Mr Saldate did not record the confession and has since been implicated in several cases of misconduct including lying under oath. An appeals court ruled last year that...