It obviously means that the power and security services are not able to perform their duties or they simply do not want to find and arrest him, in order not to arouse discontent among the many Serbs who consider Mladic a national hero.
Es obvio que el poder y los servicios de seguridad no han sido capaces de cumplir con sus funciones o simplemente no quieren encontrarlo y arrestarlo a fin de no producir malestar entre los serbios que consideran a Mladic como heroe nacional.