Three of the Blackwater security guards were found guilty of manslaughter and voluntary manslaughter, while a fourth was convicted of first-degree murder.
Fleeing Iraqi civilians say Shiite militias unleashed sectarian revenge in recaptured areas in and around Tikrit that has included burning, looting and the arrest of Sunni men.
Forces from the Iraqi army, police and militias are clearing out the self-styled Islamic State, or ISIS, in Tikrit. Many of the fighters are Shiites, and they're moving into a Sunni city.
The Iraqi military, with help from the U.S. and Iran, now holds most of Tikrit after a month of heavy fighting with the Islamic State. NPR's Alice Fordham visited and says the city is still volatile.
The main forces fighting the self-declared Islamic State in Tikrit, Iraq, are Iran-backed Iraqi Shiite militias. Despite decades-long animosity between the nations, local Sunnis are joining them.
Iraqi flags are flying over government buildings again, one month into a major offensive to reclaim the city from fighters with the self-proclaimed Islamic State.