Diagnosing Murder , Episode 4, is available now. Click here to listen.

Can a medical opinion ever deliver the kind of certainty a criminal court needs?

Doctors, lawyers and scientists interviewed by the podcast Diagnosing Murder say there is too much doubt in medicine – too much we don’t know – to provide evidence beyond reasonable doubt in many cases. But one contested medical theory , known as shaken baby syndrome , has for decades given prosecutors so much of what they need to convict someone.

The result, for some families, is devastating . In the podcast’s final episode, Episode 4, released at the weekend, we explore the dramatic conclusion of one such case. And we try to pinpoint how many cases Australia has seen. Officials say they’re not keeping track, but an unlikel

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