Darlie Routier, convicted of murdering her five-year-old son, Damon. Two of her sons, Damon and 6-year-old Devon, were killed in the attack, but she was only tried for the murder of Damon

For a time, the youngest man on Death Row, Herzog interviews Blaine Milam and others about the brutal 2008 killing of his girlfriend's 13 month old daughter.

On 24th August 1998, Douglas Feldman, then40, was driving his Harley Davidson in Plano when an 18 wheeled truck passed him and suddenly pulled into his lane. Feldman then took out a 9mm pistol and fired at the driver, killing him.