Today I'm covering the 15 most dangerous criminals I encountered or knew about, in the world of organized crime. From the Roy DeMeo’s Gemini Twins to Murd*r Inc’s most brutal executioners, I’m ranking the deadliest mobsters who terrorized even their own kind. These aren’t Hollywood myths - I lived alongside these killers, heard their stories from my father who knew them personally, and witnessed their reputations firsthand. From Sammy Gravano’s 19 murders to Albert Anastasia’s hundred-plus killi