"Making a Murderer" subject Brendan Dassey petitioning for clemency after 13 years in prison

The legal team for Brendan Dassey, one of the convicted killers at the center of the popular Netflix docuseries "Making a Murderer," is petitioning the governor of Wisconsin to grant him clemency. When Dassey was 16 years old, he confessed to helping his uncle kill photographer Teresa Halbach. Now 29, he has served more than 13 years in prison. But critics and his lawyers claim he was coerced into a false confession. Anthony Mason reports.