Modern Marvels S11 E46 Firefighting: The Arson Detectives

Meet crime fighters who take on fiery killers. In Houston, visit the site of a suspicious fire with Fire Marshall Lalo Torres as he turns ashes into evidence. Former A.T.F. head Richard Garner explains motives behind the recent church fires. And at the California Criminalists Institute, John DeHaan trains special arson dogs.