FELICITAS D. NACINO, HELEN E. RAMACULA, AND THE VOLUNTEERS AGAINST CRIME AND CORRUPTION, INC., PETITIONERS, V. THE OFFICE OF THE OMBUDSMAN, REPRESENTED BY OMBUDSMAN CONCHITA CARPIO-MORALES, BENIGNO SIMEON C. AQUINO III, ALAN LM. PURISIMA, AND GETULIO P. NAPEÑAS, RESPONDENTS