Boudreaux is a reservist with Headquarters and Service Company, 3rd Battalion, 23rd Marines, according to Capt. Jeff Pool, a Marine Forces Reserve spokesman. The New Orleans-based infantry unit deployed to the Kut area of Iraq in May and returned home in mid-September.

Pool said the command began an investigation shortly after it received the photo via e-mail several weeks ago.

Investigating officers have spoken with Boudreaux and are working to determine whether the claims on the sign are true and what, if any, charges to bring against him, Pool said. Investigation results were not expected to be released for another week or two, Marines Forces Reserve spokesman Capt. Patrick Kerr said April 8.