Mauricio Casillas, an El Paso native and former ABC-7 anchor, is returning to KVIA-TV to join Marcel Clarke as co-anchor of ABC-7’s weekday 5, 6 and 10 p.m. newscasts.  Mauricio returns to El Paso after four years reporting and anchoring at NBC4 in Washington, D.C., where he covered major breaking news, politics, public safety and