During 1996, the aides arrested an Air Force flight specialist who, under interrogation, acknowledged that he had been guiding the trafficker's planes into Guadalajara airports.

Posadas was shot dead exactly a year ago outside the Guadalajara airport.

In retaliation, the Logan Heights and the Tijuana Cartel attempted to set up Mexican drug lord "chapo" Guzmán at Guadalajara airport on May 24, 1993.

Neither they nor their federal counterparts have yet closed the case of the killing of Cardinal Juan Jesús Posadas Ocampo at the Guadalajara airport on May 24, 1993.

Cardinal Posadas died at the Guadalajara airport in 1993 when the gang's gunmen fired on his car, apparently thinking it was Mr. Guzmán's.

But of all the charges against him, Mr. Arellano had seemed most adamant about his innocence in the assassination of Cardinal Posadas, who was killed by gunfire outside the Guadalajara airport.

In retaliation, the Tijuana Cartel with the assistance of Barron Corona attempted to set up Guzmán at a Guadalajara airport on May 24, 1993.

Mexican authorities believed the Sinaloa cartel's leaders, and in particular Mr. Guzman, were the intended targets of an ambush by rival drug dealers at the Guadalajara airport in 1993 that went awry.

In retaliation, the Tijuana Cartel attempted to set up Guzmán at Guadalajara airport on 24 May 1993.

That same month, gunmen linked to the Arellano Félix gang, whose leaders now sit in jail, tried to kill Mr. Guzmán at the Guadalajara airport.