Pablo Emilio Escobar Gaviria, known as "The King of Cocaine", is regarded as the wealthiest criminal in history, with an estimated known net-worth of $30 billion by the early 1990s and approximately $50 billion total including money that was buried in different areas of Colombia.
Corruption and intimidation characterized Escobar's dealings with the Colombian system. He had an effective, inescapable policy in dealing with law enforcement and the government, referred to as "plata o plomo", (literally silver or lead, colloquially [accept] money or [face] bullets). This resulted in the deaths of hundreds of individuals, including civilians, policemen and state officials.
Finally, that's my scientific view of "plata o plomo":
