Both journalists invited Reyes to work on the team that, for over a decade, uncovered numerous official and financial corruption scandals and was emulated by other newspapers in Colombia and Latin America.

As part of this team, Reyes published a series that documented bribes paid by the multinational Ericcson to several telecommunications officials in Colombia, Venezuela, Peru and Bolivia.

In September 1994, Reyes and his colleague Jeff Leen of The Miami Herald reported that several DEA agents in Colombia had sold Medellin Cartel drug traffickers their diplomatic rights to import cars into that country.

In one of his trips to Venezuela, with the cooperation of the journalist Luz Mely Reyes, he brought to light the first corruption scandal of the government of President Hugo Chávez: the award of a printing contract of the new Bolivarian constitution to mandatary's collaborators and friends.

[18] He worked with Argentine reporters on the ramifications in the United States of the business of President Carlos Menem and his family; with Peruvians journalists, he revealed the connections of presidential adviser Vladimiro Montesinos.

For his journalistic career and his efforts to integrate Latin American investigative colleagues, Reyes received the Columbia University's Maria Moors Cabot Award in 2004.

Based on judicial records and interviews, he published an article in December 2007 that showed the ties of the father of then-Colombian president Alvaro Uribe Velez with a helicopter seized in 1984 in the raid on Tranquilandia, the largest cocaine processing laboratory in the history of the war against drug trafficking in Colombia.

[20] The report revealed unpublished judicial statements of the sister of the murdered Minister of Justice, Rodrigo Lara Bonilla, in which he remembered that his brother suspected that Uribe was implicated in drug trafficking.

A year before, Reyes had published court documents proving an unknown fact: that Uribe Velez had been accused of the crimes of falsification and contraband in connection with the importation of a Turbocomander aircraft in 1983.

[21] Together with Gonzalo Guillén, a correspondent for El Nuevo Herald in Bogota, Reyes published other reports that shed light on Uribe Velez's relationship with paramilitarism.

One of these reports revealed the testimony of former Colombian paramilitary Francisco Enrique Villaba Hernández, about Uribe and his brother Santiago's involvement in planning a massacre at Aro municipality, Antioquia department, in 1997.

In its first year, Univision Investiga produced the special "The Iranian Threat",[28] which shows how a group of Mexican students was recruited by the governments of Iran and Venezuela to prepare a cyber attack on the United States.

The students did not accept the mission but decided to tape the diplomats involved, including the Iranian ambassador and the cultural attaché of Venezuela who was later appointed consul in Miami.

Reyes found documents showing that in 1987 the US government confiscated the house in Miami of Barbara Rubio, the politician's sister and her husband Orlando Cicilia, as part of a large-scale anti-drug operation against an organization that imported and distributed cocaine and marijuana[29] in South Florida.

Four years later, The Washington Post, based in part on the documents obtained by Univision, resumed the story and expanded it adding that Cilicia's role in drug trafficking had been more important than it had been initially reported.

Details of the controversy that arose between Univision, Rubio, the Republican Party, and the Miami Herald following the report were the focus of an analysis by the media critic of The New Yorker magazine[31] and the Columbia Journalism Review.

Arming the Enemy" special, which revealed how the weapons of a covert operation of the US federal government ended up being used in massacres of innocent people in Mexico, committed by drug traffickers.

[35] In 2015 Reyes and the Univision team were recognized with the Ortega y Gasset Award, one of the most prestigious prizes in the Spanish-speaking world, for an extensive chronicle on how drug trafficking has been taken on the illegal mining business in Latin America.

[36] In addition to the selection of chronicles compiled by Planeta in the book Made in Miami and the Manual of Investigative journalism, Reyes has published the following works: A year later, the result was a real "novel", full of humor, which in 54 chapters tells the life of Baruch Vega, the photographer of the most beautiful women of the '80s and '90s, in the continent.