Wanted: Alfonso Diaz-Juarez. Sex Trafficking. 1-800-CALL-FBI. Up to $10,000 reward. Fugitive Alfonso Diaz-Juarez, aka Poncho, aka El Greñas, who is one of 16 defendants charged federally in 2013 for operating an international sex trafficking organization which forced women and minors into prostitution. Anyone with information about his whereabouts is asked to contact the FBI at 713-693-5000.