At first they revived the police, and now the political investigation
One of the main functions of the KGB of the USSR was the tracking of dissent, its identification and neutralization. In Russia, the emphasis shifted with an ideological guide, which used to be an attempt on a system, to anti -state acts. The emphasis has shifted, the function has gone, but the dissenting of the FSB is now easier to suppress now, since it was not state security that the dissent began to threaten, but to the public.