A former security contractor for Blackwater USA will not be indicted in the killing of an Iraqi guard in 2006, federal prosecutors said Monday.

According to a congressional report, Seattle resident Andrew Moonen was wandering drunk around Baghdad's Green Zone after a Christmas Eve party in 2006 when he encountered and fatally shot Raheem Saadoun, a 32-year-old guard for Iraqi Vice President Adil Abd-al-Mahdi.