Private security contractors have been involved in scores of shootings in Iraq, but none have been prosecuted despite findings in at least one fatal case that the men had not followed proper procedures, according to interviews and documents obtained by The Times... The contractors function in a legal gray area. Under an order issued by the U.S.-led Coalition Provisional Authority that administered Iraq until June 2004, contractors suspected of wrongdoing are to be prosecuted in their home countries. The contractors have immunity from Iraqi courts and have so far not faced American prosecution...[refers to Blackwater]