HOUSTON - Christopher Castillo, 33, of Monte Alto, Texas, has entered a plea of guilty to one count of bribery, United States Attorney Kenneth Magidson announced today along with Special Agent Frank Robey, director of the United States Army Criminal Investigation Command's (USACID) Major Procurement Fraud Unit (MPFU). Castillo was a civil engineer with the U.S. Army Corps of Engineers (USACE). Castillo was charged by criminal information on July 2, 2012, and entered his guilty plea just moments ago before U.S. Magistrate Judge John Froeschner.