On the night of May 3, 2021, an elevated section of Line 12 of the Mexico City Metro collapsed. Twenty-six people died. The Norwegian firm DNV analyzed the collapse and found four failures: in the design, in independent certification and supervision, in the installation of bolts, and in maintenance and inspection.
The report pointed to responsibility in three city administrations, those of Marcelo Ebrard, Miguel Ángel Mancera and Claudia Sheinbaum. Sheinbaum, then head of the city government, rejected DNV’s third report as “tendencioso y falso” (biased and false). In October 2021, prosecutors announced homicide charges against ten former officials, among them the head of the original construction project.