Back in 2014, Mark Ames wrote an article for the now-defunct Pando that details the exact sort of things USAID and their man Dan Mitrione got up to in Uruguay back in ‘69, training death squads to deal with Tupamaro rebels. This involved demonstrating torture techniques to Uruguayan police by dragging random homeless people off the street and exposing them to electroshock torture to their mouths and genitals until they died.

Mitrione taught local police specialized forms of electroshock torture, introducing wires so thin they could fit between the teeth and gums. He also demonstrated drugs that induced violent vomiting fits, and advised on psychological tortures, such as playing tapes of a woman and child screaming in a room next to the interrogation room, and telling the detainee those are his wife and child. And it was all done under the aegis of USAID.

https://en.wikipedia.org/wiki/Dan_Mitrione
https://www.counterpunch.org/2020/08/13/teaching-torture-the-death-and-legacy-of-dan-mitrione/