JACKIE JUDD:

The set of findings or symptoms is often known as the triad — bleeding behind the eyes, bleeding around the brain and swelling of the brain.

For decades, some doctors have considered the presence of the triad as irrefutable proof that a baby has been violently shaken, as illustrated in this animation used in legal cases, causing the brain to slam against the skull. Further, that the disabling and sometimes fatal symptoms come on so quickly, the last person with the baby must be responsible.

The most notorious case involved Louise Woodward, a nanny in Massachusetts, who, in 1997, was found guilty of involuntary manslaughter. More than 1,000 cases of Shaken Baby are diagnosed every year. Experts estimate that at least 100 of those are prosecuted.