square at the smith county courthouse, where every day, passions run high. >> in a courthouse, whether it's new york city or tyler, texas, that courthouse is full of emotion. especially in the courts of divorce and child custody. >> that day, february 24th, 2005, 43-year-old david arroyo is waiting outside for his ex-wife to arrive for a child support hearing. >> he had somehow blamed all the problems in life on his wife and his son. >> armed with a powerful semiautomatic rifle, he opens fire. >> we have shots fired on the square. we have someone down. >> appears to be a hispanic male. looks like he's in front of the old levine store. >> the shooting is all caught on