How the Thai massacre unfolded over three hours

At first glance, former police sergeant Panya Khamrap's quiet backyard in Thailand's province of Nong Bua Lam Phu looks like any other in the neighborhood. But last week, Panya became the perpetrator of Thailand’s worst massacre, murdering 36 people in a three-hour rampage through the district in which he was born. Olivia Chan has more.