The last of six illegal Mexican immigrants accused of lying about their status to get work at Cessna Aircraft Co. pleaded guilty and agreed to a sentence of 13 months in federal prison.

Homar Vargas, 25, pleaded guilty Friday to one count of using false documents to be employed in the United States.

The other five pleaded guilty in July and this month to various immigration violations. They are Rogelio Ortega, 42; Pedro Aguilar, 51; Jose L. Camacho, 51; Fernando Lopez, 32, and Roberto Gutierrez, 47.

All six will be sentenced sometime in the fall. After serving their sentences, they will be deported and banned from ever re-entering the United States.