They have used the judiciary, the police, the civilian bureaucracy, NAB, the FIA, the FBR and the SBP, etc., just to protect their own partisan interests. But, it is also a sad fact that NAB has failed to defend its decision in the Avenfield apartments case in the Islamabad High Court which has granted bail to Nawaz Sharif and Maryam Nawaz. After this bail, NAB is facing scathing criticism from the people of Pakistan. Shahbaz Sharif's arrest has once again put NAB under the spotlight. In this case, NAB should investigate the case very professionally, independently and honestly. NAB can prove its competence by delivering against prominent and powerful politicians. NAB must demonstrate to the people that all are equal before the law and investigative agencies have no fear in arresting powerful individuals who are implicated in corrupt practices. Politically, Shahbaz's arrest has proved a blow to the PML-N, as he was not able to campaign in the run-up to the by-elections held on October 14.