Gustavo de Jesús Gaviria Rivero (25 December 1946 – 11 August 1990) was Pablo Escobar's cousin and right-hand man, the MedellÃn cartel's financial head, and the brains of the organization.
He and Escobar had collaborated in their careers since the early 1970s.
Though he was the owner of a fortune comparable to Escobar's and even had a military apparatus to his service, Gustavo was not as well known, as he kept a low profile.
It is speculated he was killed by Search Bloc and the incident was covered up.
Gustavo's death deeply affected Escobar, given their deep personal and professional relationship.
Nonetheless, Escobar did not attend his cousin's funeral but instead listened to the funeral mass via a radio his assistant had attached to the officiating priest.
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.