Shaken Babies

Shaken Baby Syndrome (SBS) was once believed to be virtually a medical diagnosis of murder - clear-cut and convincing beyond a reasonable doubt. But in recent years there's been growing disquiet about miscarriages of justice after infant deaths.

Some high-profile acquittals, exonerations and legal enquiries have cast doubt on the old certainties about SBS. Yet we know that child abuse does happen - often out of sight of witnesses.

For Assignment, Linda Pressly examines the evidence and asks how the science of the brain's grey matter fares in the black-and-white world of the courtoom.