FGR reports no federal arms case against Sandalio Sainz
By Cartel Insider Wire Desk · Edited by Mica Treviño
Original reporting: Infobae México
What happened
Infobae México cited federal documents reporting no investigations against the businessman, amid separate proceedings over an allegedly forged ministry letter used to demand money.
Reporting and context
Mexico’s federal prosecutor’s office reported finding no records of federal arms-trafficking investigations against businessman Sandalio Sainz de la Maza Zúñiga, according to Infobae México. The outlet cited a Federal Ministerial Police report dated October 27, 2026, which also reported no open federal investigations against Óscar Humberto Bistrain Tenorio and Christian Pablo Varela Escobedo.
Infobae México reported that the police document was incorporated into proceedings concerning an allegedly forged official letter. That separate investigation concerns the use of logos from the Anti-Corruption and Good Government Ministry and a signature attributed to its head, Raquel Buenrostro Sánchez.
The ministry filed its complaint in August 2026. According to the account published by Infobae México, the allegedly false letter purported to authorize administrative reviews of private security companies Serprosep and Armour King and four individuals. The complaint alleged that the document was used to demand money in exchange for halting the supposed proceedings.
The report also cited an October 13 communication from the specialized federal prosecutor’s office for terrorism, arms stockpiling and arms trafficking. It stated that Sainz was not listed as a person under investigation, an accused person or a victim in case FED/FEMDO/FEITATA-MEX/0000928/2024. The same clarification covered Serprosep and Armour King.
Federal prosecutors are investigating how the allegedly forged letter was produced and used, and any resulting responsibility. The reported absence of federal investigation records against the named businessmen is distinct from those proceedings over the alleged forged document.
Original publication: Infobae México.