U.S. Magistrate Judge Bernardo Velasco found Natalie Hoffman, a volunteer with humanitarian aid group No More Deaths, guilty on all three charges against her. He also found three other volunteers — Oona Holcomb, Madeline Huse and Zaachila Orozco-McCormick — guilty of the two charges they each faced. TUCSON — A federal judge found four humanitarian aid volunteers guilty for dropping off water and food for migrants at a protected wilderness area along the Arizona-Mexico border, notorious for the number of human remains recovered each year.