Warning: This episode contains details of violence against children.  New science in the 1990s advanced the understanding of how fires work, but it took years for substantive change to follow. That had a huge impact on those already sitting in prison for arson convictions that were actually accidents.  David Gavitt and Anthony Kyles each spent over 20 years in prison, both convicted using now-outdated investigative methods for arson. CSI On Trial is a co-production of iHeart Podcasts and School of Humans. It is a Curiosity Podcast based on the Curiosity Stream series CSI On Trial. You can watch all six episodes of the video series here if you sign up for Curiosity Stream.See omnystudio.com/listener for privacy information.