In her latest year-long investigation, Texas crime writing legend Pamela Colloff delved into the shadowy world of the con artist and jailhouse snitch whose testimony put four men on death row. In this episode, listen in as reporter and podcast host Keri Blakinger asks the Austin-based ProPublica writer about the problems with informants, the difficulties in reporting on them, and answers to a slew of Twitter-user questions about the process.