| Gustavo Gaviria | |
| Alias: | El León (The Lion) El Doctor (The Doctor) [1] |
| Birth Date: | 25 December 1946 |
| Birth Place: | Pereira, Colombia |
| Death Place: | Medellín, Colombia |
| Organization: | Medellín Cartel |
| Relatives: | Pablo Escobar Gaviria (cousin) Roberto Escobar (cousin) |
Gustavo de Jesús Gaviria Rivero (25 December 1946 – 11 August 1990) was a Colombian drug trafficker. As Pablo Escobar's cousin and right-hand man, Gaviria controlled the Medellín cartel's finances and trade routes. He and Escobar had collaborated in their criminal careers since the early 1970s.
Though he was the owner of a fortune comparable to Escobar's and even had a military apparatus at his service, Gaviria was not as well known, as he kept a low profile.[2]
After Gustavo's death, Escobar decided to turn himself in but to stay at La Catedral, a jail of his own making, guarded by his own guards. Since Gustavo died four days after President César Gaviria took office, at the time, the media and the country in general thought the president had begun his term with an offensive against the narcoterrorists. Gustavo's death triggered a counter-offensive by Escobar that initially destabilized the new president's administration.