Political police

The term secret police (sometimes political police) refers to intelligence services or police and law enforcement agencies which operate in secrecy and are, in consequence, subject to little to no , accountability, or requirement for transparency of action. Secret police organizations are often used by totalitarian states to protect the political power of an individual dictator or an authoritarian () political regime by means of systematic engagement in extrajudicial activities. Secret police organisations are often utilised for the purposes of policing the activities of dissidents, and weakening opposition organisations.

Instead of transparently enforcing the rule of law and being subject to public scrutiny as ordinary police agencies do, secret police organizations are specifically intended to operate beyond and above the law in order to suppress political dissent through clandestine acts of terror and intimidation (such as kidnapping, coercive interrogation, torture, internal exile, forced disappearance, and assassination) targeted against political enemies of the ruling authority.

Secret police forces are accountable only to the executive branch of the government, sometimes only to a dictator. They operate entirely or partially in secrecy, that is, most or all of their operations are obscure and hidden from the general public and government except for the topmost executive officials. This semi-official capacity allows the secret police to bolster the government's control over their citizens while also allowing the government to deny prior knowledge of any violations of civil liberties.

...
Wikipedia