A Navy SEAL is in custody as part of an investigation into allegations that he was involved in the 2017 execution of a detainee in Iraq with a blade. The suspect has not been charged with a crime, but SEAL officials told Navy Times the special operator is in a navy prison as the probe continues. “A service member currently assigned to a Naval Special Warfare unit is under investigation by NCIS for professional misconduct while deployed to Iraq in 2017,” said Naval Special Warfare spokeswoman Cmdr. Tamara Lawrence. “We take all allegations of misconduct seriously and will cooperate fully with investigative authorities.” Seven officials at five flag commands, including the Pentagon, have told Navy Times about the alleged execution of the prisoner of war. The SEAL has not yet been identified.