Prosecutors handling the courts-martial of two local Navy SEALs charged with not stopping a teammate’s alleged assault on an Iraqi detainee faced another setback Friday. Cmdr. Tierney Carlos agreed to exclude a statement made by one of the SEALs to the special agent investigating the allegations in September because the agent didn’t advise him of his right to remain silent. As a result, one of two charges against Petty Officer 2nd Class Jonathan Keefe likely will be dropped.