In the wake of Elliot Rodger's killing spree, many people have looked to law enforcement and the mental health system, wondering what — if anything — could have been done to avert this tragedy.

Rodger had several run-ins with the local sheriffs department prior to Friday's rampage. His mother had even alerted authorities after she saw disturbing videos he posted online. But these red flags were not enough to prompt a serious intervention.

For more we're joined by Dr. George Woods. He's a forensic psychiatrist in San Francisco and the Vice President of the International Academy of Law and Mental Health.