Dandeny Muñoz Mosquera, also known as "La Quica", was purported to be the chief assassin for the Medellín Cartel of Colombia.
See also: ADX Florence
He was responsible for the deaths of an unknown number of people although estimates range in the hundreds, supposedly murdering members of the Medellín Cartel, members of the rival Cali Cartel, police officers and government officials. Among his crimes is the 1989 bombing of Avianca Flight 203, which killed 110 civilians, for which he is serving ten life sentences plus 45 years in the Federal ADX Supermax prison in Florence, Colorado, although there has never been any solid evidence connecting him to this crime. The media in Colombia blamed this incident on Pablo Escobar and his associates as he was allegedly responsible for nearly all of the major attacks in the drug war, as the result of being a public enemy in America, who was pressuring Colombia to fight the drug trade.
In 1991, Muñoz Mosquera was arrested in Queens, New York for traveling with a fake passport. He was convicted and sentenced to six years in jail. While he was in jail, federal prosecutors claimed that he was a major player in the Medellín Cartel and the bombing of Avianca Flight 203. Muñoz Mosquera was charged with “conspiracy to import and distribute cocaine, substantive importation of cocaine, participating and conspiring to participate in a racketeering enterprise, engaging in a continuing criminal enterprise, various offenses relating to the bombing of a civilian airliner and the extraterritorial murder of two citizens of the United States." His first trial was declared a mistrial. In his second trial, he was convicted on all counts. He is currently serving his sentence of 10 life sentences plus 45 years, all to be served consecutively, at ADX Florence, the Federal ADX (supermax) prison.
While Mr. Mosquera was convicted of the Avianca bombing, his involvement in the bombing was questioned by Colombian attorney general Gustavo de Greiff, who sent a letter to Judge Sterling Johnson before the final trial, stating: "I felt necessary to inform you...with the intention to avoid the miscarriage of justice in the case you have in your hands. We have no evidence linking Mr. Muñoz Mosquera to that attack." De Greiff was accused by United States officials of being involved financially in the cocaine trade.
The Colombian government initially suspected Gonzalo Rodríguez Gacha a.k.a. 'The Mexican'. Carlos Maria Alzate has also been blamed for the bombing and had confessed to the crime before Mosquera was put on trial. Many witnesses testified in court about Mosquera's brutal acts as a high-ranking member of the Medellin cartel. Many of those witnesses were convicted felons with links to the Medellín and Cali Cartels. Mosquera claims that he did not recognize the prosecution's witnesses, and his defense hinged on the insistence that he was a small-time thief and not even a sicario, let alone Escabar's chief assassin. He did not deny that his brother Brance, known as 'Tyson', later shot dead by Colombian forces, was involved in the Cartel (some have claimed him to have been the Medellín 'Chief of Security').