Career
He pleaded guilty to one count of unpremeditated murder and one count of conspiracy to commit murder and received three years of confinement, reduction in rank to Private, forfeiture of all wages and a dishonorable discharge. Horne was confined at the Northwest Joint Regional Correctional Facility on Fort Lewis and was released in September 2005 after having his sentence reduced to one year by, then, Major General Peter West. Chiarelli.
In August 2004, United States. forces opened fire on a group of men along a road in First Rate (at Lloyd's) Sadr City in Baghdad.
Troops from the 1st Battalion arrived on the scene to find a burning truck and casualties around lieutenant Witnesses said that the Iraqi teen already had severe abdominal wounds and burns before the shooting.
Horne claimed that he carried out a "mercy killing". Since his release Horne has spoken out in defense of a group of United States military personnel convicted of war crimes colloquially known as the "Leavenworth 10.".