Mexican President Andrés Manuel López Obrador is calling on former Secretary of Public Security Genaro García Luna, who was convicted of drug trafficking charges in the United States last year, to provide evidence supporting his claims that the president is connected to drug trafficking. García Luna, currently in jail, alleged links between López Obrador and the Sinaloa cartel faction led by Ismael “El Mayo” Zambada in a letter distributed by his attorney to the press.

This accusation comes amidst previous allegations that López Obrador’s past presidential campaign received donations from drug traffickers. López Obrador responded to García Luna’s claims during a news briefing, stating that if there is proof, such as videos, calls, or audios, it should be shared with the public. The president also suggested that García Luna consult with his colleagues at the DEA for evidence.

García Luna, who served under former presidents Vicente Fox and Felipe Calderón between 2000 and 2012, was found guilty of accepting bribes to protect drug cartels. In the letter, he maintained his innocence and claimed that Mexican and U.S. officials have evidence connecting López Obrador to drug trafficking leaders.

The former Mexican security official, facing a potential sentence of 20 years to life in prison, accused the Mexican government of providing false information about his case to the U.S. He alleged that U.S. prosecutors offered him a reduced sentence in exchange for becoming a protected witness. García Luna also described harsh conditions during his almost five years of detention in the U.S., citing threats to his well-being.

Moreover, Mexican authorities have accused García Luna of embezzling millions of dollars from government contracts. Pablo Gómez, head of Mexico’s anti-money laundering unit, stated that García Luna and his associates obtained dubious government contracts and channeled funds to offshore accounts, including in Barbados, which were then used to purchase properties and vehicles in Miami. García Luna also attempted to influence other prisoners to provide false statements in support of his bid for a retrial on drug trafficking charges.

García Luna’s sentencing is scheduled for October 9, as he continues to deny all allegations against him.