Inside Tucson's Crime Lab: Arson

When Tucson police arrive at an arson like the one involved in the Susan and Blane Barksdale murder case, crime scene investigators comb the scene for clues. They pick up the pieces and after checking it into evidence lockup it ends up at the TPD crime lab. Fire debris analyst Lisa Windsor will test the evidence to find out if someone used an accelerant to start a fire at a crime scene.