darcy atkinson , aged two , died of brain injuries in december 2012 .
he vomited 3 times and went rigid in bath under care of mother 's boyfriend .
he had bruising on his ears , temple and limbs and traces of the stimulant ritalin in his system when he died .
a doctor told an inquest into his death he had been ` caned or whipped '
he said darcy has serious bruising around his ears which looked infected .
his mother said she received a photo and text from her boyfriend the day before he died , saying he had bumped his head while paddle boarding .
she then denied receiving the photo which investigators never found .