Although it's pretty over the top I think it's probably true. When you read the whole book and look at all the citations there are soo many unbelievable things that are cited that to me it makes the rest plausible. I mean it's a fact he was in there with the Medellin cartel so why would he stoop as low as to lie about being with the gambinos who were pretty much peasants compared to him in the end. Also he met all the Miami OC guys trough his connections and all the murders and the bombing really happened and are verified.