Well I'm absolutely willing to believe that the structure that has as its main job to fight organized crime would do so, and it being shut down would lead to raise of said crime. Your alternative I disregard due to Occam's razor. Especially considering that theories of the opposite were parroted by unthinking westernization fanboys. They have reasons to lie. It's not like I have any love for commies but I'm unwilling to lie just to attack them. Any country irrespective of ideology would have to develop more or less capable crime-fighting structures just to survive for anything close to 70 years. And ideology doesn't matter here, even if that's communism.