A Mexican drug lord was released from custody after being convicted in the 1985 killing of Drug Enforcement Administration agent Enrique ‘Kiki’ Camarena. 

Ernesto “Don Neto” Fonseca Carrillo, one of the co-founders of the Guadalajara Cartel, was freed last weekend after completing his 40-year sentence, a federal agent confirmed to the Associated Press. 

Fonseca, 94, had been serving the remainder of his sentence under home confinement outside Mexico City since being moved from prison in 2016. The DEA did not immediately respond to a request for comment Thursday from Fox News Digital. 

Rafael Caro Quintero, another Guadalajara Cartel co-founder who also was convicted in the murder, was one of 29 cartel figures Mexico sent to the United States in February. It’s unclear if the U.S. is now looking to bring Fonseca into custody. 

Caramena was killed in Mexico in 1985. (DEA)

The 37-year-old’s body was found dumped on a nearby ranch about a month later. 

In 2013, Caro Quintero walked free after serving 28 years in prison.  He was released after a court overturned his 40-year sentence for the kidnapping and killing of Camarena. 

An FBI wanted poster for Rafael Caro Quintero.  (FBI/AP/File)

Caro Quintero was arrested again by Mexican forces in July 2022 after he allegedly returned to drug trafficking. 

Fox News’ Greg Wehner, William La Jeunesse, Lee Ross and the Associated Press contributed to this report.