North Carolina ? Federal authorities plan to post billboards nationwide with the picture of a Marine wanted in the slaying of a pregnant colleague, and the sheriff announced a $25,000 reward Monday for information leading to his arrest.

Authorities are looking for Marine Cpl. Cesar Armando Laurean, wanted in the death of Marine Lance Cpl. Maria Lauterbach, who had accused him of rape. FBI officials said the first billboards with Laurean’s photo would appear in Tampa, Fla., Columbus, Ohio, and Las Vegas.

Authorities recovered what they believe to be the burned remains of Lauterbach and her fetus from a fire pit in Laurean’s backyard over the weekend. Detectives believe Laurean, 21, of the Las Vegas area, fled Jacksonville before dawn Friday, and have said he left behind a note in which he admitted burying her body but claimed she cut her own throat in a suicide.