Showtime made a whole documentary about it and good lord we hope this part is exaggerated.
The authorities had a number of inside sources, including a buddy of Tarzan's known as "Cannibal" after he responded to an arrest attempt by biting off the cop's nose. The DEA located Cannibal in a Bulgarian prison and persuaded him to turn informant. Honestly, what are things coming to when you can't even trust Cannibal? Meanwhile, Tarzan was very proud of a phone someone gave him that had been "hacked" to make free calls anywhere in the world (obviously the bill was actually just footed by the cops, who were monitoring every call). The authorities swooped before the submarine could be delivered.
However, the gang did manage to successfully deliver two Russian military helicopters. That deal almost went wrong when enraged Russian gangsters kidnapped Tarzan and demanded a cut. But the situation was defused when Almeida appeared, pretending to be none other than Pablo Escobar himself. Remember kids, if you ever find yourself in a situation where the unexpected appearance of Pablo Escobar makes everything better, it could be time to reconsider some life choices.