You hardly have to speculate.

https://en.wikipedia.org/wiki/Operation_Condor

Condor was formally created in November 1975, when Chilean dictator Augusto Pinochet's spy chief, Manuel Contreras, invited 50 intelligence officers from Chile, Uruguay, Argentina, Paraguay, Bolivia, and Brazil to the Army War Academy in Santiago, Chile. The operation ended with the fall of the Argentine junta in 1983.

...

In 1980, Regional Security Officer James Blystone had met with an Argentine Intelligence Source. In the declassified memo, Blystone had asked about the disappearance for two Montoneros that had plans to travel from Mexico to Brazil to meet with other Montoneros. The Argentine Intelligence Source had explained that they had been taken and interrogated, and later contacted their Mexican and Brazilian counterparts for approval to conduct an operation to capture the other Montoneros that were expecting their arrival. Once they were under custody, they had utilized fake documents to check into their hotel to impersonate their presence and not alert any other Montoneros of their capture. They were imprisoned at Campo de Mayo

The Mexican Connection of the Iran Contra Affair

In what newspapers here are calling ''the Mexican connection'' to the Iran-contra affair, the Mexican political establishment and its right-wing opposition are trading charges that each has maintained improper contacts with American organizations supplying aid to anti-Sandinista forces in Nicaragua.

Critics of the opposition National Action Party accused the party of treason after it was disclosed last month that a prominent party member met several times in Washington last year with Carl R. (Spitz) Channell, director of the National Endowment for the Preservation of Liberty.

Mr. Channell recently pleaded guilty to conspiracy to defraud the American Government by raising tax-deductible contributions for a purpose that was not deductible: buying arms for the contras. He was an associate of Lieut. Col. Oliver L. North, who developed the contra arms supply network while working for President Reagan's National Security Council.

https://en.wikipedia.org/wiki/M%C3%A9rida_Initiative

Some examples of Mexico's paramilitary abuses at the time included the sexual assault and rape of dozens of female detainees by police in San Salvador Atenco, and the disappearances of dozens of teachers in the state of Oaxaca in 2006, as well as the killings of seven innocent bystanders, including the American journalist Brad Will by off-duty policemen. Almost half of Mexican police officers examined in 2008 failed background and security tests, a figure that rose to nearly 9 of 10 policemen in the border state of Baja California