Silent Witness S07E08 - Beyond Guilt, Part Two

Sam is determined to find out how Dr. Sachs is able to pinpoint time of death so precisely, even if it means several convictions are overturned. A mother changes her plea to guilty, but Leo is still not satisfied that they have the truth. A loving daughter draws a picture for her prisoner dad that brings a confession. Dr. Sachs is found to have violated professional ethics, but what will serve the cause of justice best?