48 Hours on ID: Sister's Fight for Her Brother

A sister stands by the brother accused of murdering their parents. She insists that he's innocent and there's more to the story. "48 Hours" correspondent Erin Moriarty reports. (Editor's note: On October 19, 2022, Brandon Pettit's conviction was overturned after an appeals court found that his statements to police should not have been admitted at his trial. Prosecutors say they plan to retry the case.)