Griselda Blanco was one of the first and one of the most violent Colombian drug smugglers in the 1970s and 80s. She was shot dead this week in Medellin by an unidentified gunman. Blanco was 69. For more on her life, David Greene talks to Billy Corben, the director of the movie Cocaine Cowboys.
'Godmother' Of Cocaine Trade Murdered In Colombia
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