Documentary revisits ignored warnings before El Chapo escape

Reporting and context

Prisoners who heard drilling beneath Mexico’s Altiplano prison warned officials before Joaquín “El Chapo” Guzmán escaped in July 2015, but their complaints were ignored or met with threats, according to Infobae México’s account of the new documentary series Operación Cisne Negro. The N+ Docs production premiered October 27 on ViX.

The report draws on previously unreleased testimony and an early-2016 Criminal Investigation Agency, or AIC, video. Inmates described as Guzmán’s rivals, including prisoners linked to Los Zetas, the Tijuana Cartel and the Jalisco New Generation Cartel, recalled persistent construction noise. Salvador Martínez, known as “Comandante Ardilla,” and Óscar Omar Treviño Morales, “Z-42,” described drilling day and night. Teodoro García Simental, “El Teo,” said he was warned to stop complaining.

Infobae México reported that the series examines whether roof waterproofing deliberately masked the tunnel construction. José Bernabé Brizuela, “La Bestia,” said workers on the roof made noise that diverted attention from the drilling below. The AIC material likewise describes the roof work as an apparent cover.

At least five projects were authorized before the escape, including new cell floors, bars, cameras, cellphone jammers and waterproofing. Researcher Samuel Adams said the roof contract was awarded directly in 2014 and delayed after a tax-authority seizure involving the contractor. An order dated June 29, 2015, scheduled the work for July 1–31. It covered only the special-treatment wing and lasted more than 20 days, although internal records put the normal duration at one week.

Guzmán disappeared from his cell’s camera view at 8:52 p.m. on July 11. Three teams were monitoring him: prison staff, Federal Police and two CISEN intelligence operators assigned exclusively to his cell. The reconstruction says 18 minutes passed before a Federal Police monitor noticed his absence, another seven before staff answered a call, and 11 more before officers entered the cell.

The highest emergency alert was declared 43 minutes after the escape. A forensic assessment cited in the report put his journey through the 1.4-kilometer tunnel, on a motorcycle adapted to rails, at 19 minutes. Three vehicles waited outside and passed within roughly 400–500 meters of an Army installation, the account says.

The AIC investigation found underground-vibration sensors, perimeter-fence alarms and cellphone jammers were not functioning. Only five of 20 watchtowers were staffed. Two CISEN monitors gave conflicting accounts of frozen screens, but expert examinations found the screens had not frozen.

The series also revisits unheeded recommendations to relocate Guzmán, who remained in cell 20 throughout his 16 months there. Prison director Valentín Cárdenas attributed the order to keep him there to Federal Police intelligence coordinator Ramón Pequeño, according to statements cited from the case file. Pequeño was questioned twice but never formally referred for prosecution.

Infobae’s account says federal-prisons commissioner Ignacio Hernández Mora testified but was not investigated; it identifies Monte Alejandro Rubido and Miguel Ángel Osorio Chong above him in the command structure. The two CISEN monitors were prosecuted and, according to the documentary investigation, acquitted a year later.

More than 30 people connected to the prison were detained for questioning after the escape. The report says a Federal Police monitor identified in the series as Jaime spent seven and a half years imprisoned despite a sentence of four years and four months.

Original reporting: Infobae México.