Babies might be killed by even mild shaking. Such injuries couldn't happen just by bouncing a child on your knee, or in normal everyday interactions between mother and child. "They would have to involve vigorous unsupported movement of the head." Most people would realise this kind of force would be dangerous. "But you could imagine scenarios that might produce the damage without it being deliberately inflicted."
Today's news continue to be scary. I don't want to even hear this, but I've found it, and read it. I have to blog it.