Francisco Alarcon- Flores.

(CNSNews.com) -- An illegal alien from Mexico who had previously been convicted and imprisoned for raping a minor in the United States was caught and arrested on Monday for illegally re-entering this country, reported U.S. Customs and Border Protection (CBP).

Francisco Alarcon-Flores, 40, was arrested by Border Patrol agents just east of Nogales, Texas. While doing a criminal records check on Alarcon-Flores, agents discovered that he had been convicted in 2003 in Yankton, South Dakota, on a statutory rape charge.

Alarcon-Flores was sentenced to five years in prison for the rape offense and now he faces prosecution for re-entering the United States as a felon, said the CBP.

(Image: YouTube.)

"All persons apprehended by the Border Patrol undergo criminal history checks using biometrics to ensure illegal immigrants with criminal histories are positively identified," said the agency.

Citizens can report suspicious activity to the Border Patrol and remain anonymous by calling 1-877-872-7435 toll free.