Mohamed al-Sumaidaie, Iraq's ambassador to the United Nations, accused U.S. marines of murdering his cousin's 21-year-old son, Mohammed Sumaidaie, who was studying engineering at the University of Technology in Baghdad. "All indications point to a killing of an unarmed innocent civilian - a cold-blooded murder," said Sumaidaie. "The Marines were smiling at each other as they were leaving.".
Someone killed someone in cold blood. 
( z1 kill :ARG0 ( z2 someone ) :ARG1 ( z3 someone ) :manner ( z4 blood :ARG1-of ( z5 cold ) ) )