It's a scenario as horrifying as it is heartbreaking: a frustrated parent ... a baby that just won't stop crying ... and suddenly, what were tender, cradling arms become instruments of death. At least this is how Shaken Baby Syndrome has been characterized in countless court cases in recent years. But what are the scientific foundations of this diagnosis? "Diagnosis Murder" tells the story of several Canadian parents who say they were wrongfully accused and the leading-edge medical researchers who believe they're telling the truth. The stakes are high: Some have gone to jail. All have had their other children taken away from them. Is Shaken Baby Syndrome conclusive evidence of murder? Or is it a scientific hypothesis that has convicted an untold number of parents as killers when their children actually died from other causes?