Why do mothers kill their children?

I spoke to Peter Breggin, one of America's most prolific psychiatrists and my oldest guest ever at 90, fresh from a stroke, and still warning about pharmaceutical drugs.He argues that Lindsay Clancy would never have killed her kids without psychiatric pills, and that no drug can treat the root of her distress, or that of millions of parents. Big Pharma doesn't see patients as people, but as experiments.