Defense: Social worker's mistakes contributed to killer foster mom's delusional behavior

Defense: Social worker's mistakes contributed to killer foster mom's delusional behavior

A San Francisco social worker charged with overseeing foster care of a twin boy and girl who were tortured in their Antioch home for years once told their foster mother that if the girl acted up in her house, "she would hit her, too," a defense attorney said Tuesday at the opening of Shemeeka Davis' sanity trial.