Vilseck, Germany (CNN) -- U.S. soldiers interrogated by the Army in the 2007 murders of four Iraqi detainees blamed a military policy they said made it too hard to detain suspected insurgents, a CNN investigation has found. Soldiers questioned in the killings said the sergeant in command of their detachment ordered the suspected insurgents killed because Army rules made it too difficult to hold them. "They're gonna be right back on the streets," one soldier put it. CNN obtained an extraordinary 23½ hours of Army interrogation videotapes that detail the March 2007 executions of the prisoners by three sergeants who were attached to Alpha Company, 1st Battalion, 18th Infantry Regiment.CNN obtained an extraordinary 23½ hours of Army interrogation videotapesTapes detail March 2007 executions of four Iraqi prisoners by three sergeantsTapes show one of the sergeants confessing to the crimeWatch Saturday, Sunday at 8 and 11 p.m. ET; read blog posts: Abbie Boudreau; Scott Zamost
The interrogators press him about who killed the fourth _.