Who killed my baby?.

A report into parents accused of 'shaking' their babies to death, charting the increasing number of cases where evidence is disputed. In Britain, two parents a week are accused of 'shaken baby syndrome'. Here we follow two cases in particular, that of Joseph Wainwright accused of shaking his 2-month old son Joshua, and that of a family in London who remain anonymous. Around these two cases we hear from paediatricians, lawyers, police investigation units and medical researchers.