A Little Thing Called Murder (2006)

In this true story, high-society sociopath Sante Kimes (Judy Davis) forces her son, Kenny (Jonathan Jackson), to be her accomplice in a decade-long crime spree. Using her skills of manipulation and persuasion, Sante teaches Kenny how to steal, forge and murder. After killing a rich woman and stealing her identity, Sante is caught trying to conceal the murder. Under pressure from the authorities, Kenny must decide whether or not his loyalty to his mother will keep him from telling the truth.