In this photo taken Tuesday, March 19, 2013, Texas State Fire Marshal Chris Connealy, center, listens to staffers at the fire science lab explain test results in Austin, Texas. Connealy is working the Innocence Project to re-evaluate arson convictions based on faulty science. Authorities in Texas and several other states are beginning to re-examine old arson cases in which defendants may have been convicted with questionable scientific evidence. (AP Photo/John L. Mone)
