According to media investigations, former Secretary of the Interior Adán Augusto López Hernández and his brother Melchor López Hernández have been linked to companies involved in the corruption scheme known as La Estafa Maestra. Mexicanos Contra la Corrupción y la Impunidad (MCCI) documented that the notary offices of Adán Augusto López and Melchor López Hernández in Tabasco, Mexico, were used to incorporate several companies that were later included on the Servicio de Administración Tributaria (SAT) list of entities classified as companies that issue simulated invoices (Empresas que Facturan Operaciones Simuladas, EFOS), commonly referred to as shell companies. These firms were reported to have been used in financial operations tied to the diversion of public funds. Additionally, documents reviewed by journalists show that the former Secretary of Mobility of Tabasco, appointed during López Hernández’s tenure as governor, used the same notarial offices to found other companies subsequently listed by the SAT as EFOS.[6]
Investigations by MCCI also found that two lawyers specialized on the incorporation of firms were involved in the creation of at least six companies linked to the Estafa Maestra corruption scheme, as well as 13 additional companies connected to the embezzlement of public funds. These companies shared the same address in Monterrey, Mexico, as a firm identified by the International Consortium of Investigative Journalists (ICIJ) as being connected to Odebrecht’s so-called “bribery division," which was part of the Odebrecht Scandal.[7]
According to earlier investigations, the Brazilian construction company Odebrecht employed a similar modus operandi, using simulated service contracts to justify financial transfers that were ultimately used to pay bribes. This mechanism closely resembled the scheme used in the Estafa Maestra case.[8]
Although Andrés Manuel López Obrador and Claudia Sheinbaum's governments promised to investigate and prosecute those involved, impunity has largely prevailed and most of the money has not been recovered.[9]