A Conway police officer serving in Iraq says it`s frustrating to investigate crimes with Iraqi police. Captain Derald Neugebaure is serving with the Arkansas 39th Infantry Brigade in Iraq. He says Iraqi investigators aren`t as thorough as investigators in Arkansas. Neugebaure also says he suspects that police may be involved in an ambush that happened last Thursday. He says an Iraqi police officer may have produced false documents so that he wouldn`t be identified as an attacker in the ambush. Neugebaure says he talked to Sergeant James Aguilar of Ozark, Arkansas, a military policeman with the 39th who helps train Iraqi policemen. He said he told the sergeant that Iraqi officers need more training -- especially in investigation work.