NOCA, Ariz. (WTVD) -- A man arrested after he illegally entered the United States from Mexico on Monday is a convicted sex offender in North Carolina.Border Patrol agents in Arizona apprehended Cirilo Flores-Albino, 46, fewer than 20 yards north of the border.Flores, who is from Mexico, was convicted in 2009 for indecent liberty with a child in Harnett County.He is in federal custody pending prosecution for re-entry as an aggravated felon.The Border Patrol said it conducts criminal history checks using biometrics on all detainees to make sure "illegal immigrants with criminal histories are positively identified."