Two convicts blame each other for brutal Austin murders

In 2018, Shawn Gant-Benalcazar was convicted in the 2014 murder of Kathy Blair, and Timothy Parlin was convicted in the murders of Kathy Blair and Billie and Sidney Shelton. "48 Hours"' Maureen Maher sat down with each of them, hoping to get answers. Instead, both men claimed they were innocent - and pinned the blame on each other.