Local News, Southwest, zNew Headline The specter of Pancho Villa drove Univ. of TX at El Paso professor to investigate sex trafficking along the border Jan 6, 2014, 11:11 AM 0 By Patricia Acosta Borderzine EL PASO — To most people Pancho Villa is a legendary character from Mexican history, but to Ruth McDonald, a professor at the University of Texas at El Paso, Villa is a real man who…