I first became aware of him when there was a South American Bishops Conference in the city of Talca, circa 1975 or so. Liberation Theology was sweeping the continent then. Brazilian Bishop dom Helder Camara was the figurehead of the movement.
Anyway, Romo and other DINA goons were in Talca shadowing the non-church people who attended the conference. Two Agence France Presse reporters were detained on the way back to Santiago and were harassed but turned loose. The both left the country soon because of the DINA threats. Romo died couple of years ago and the planet is better off.
As for Argentina, if you have not seen it, I highly recommend the film "The Official Story." It is a shocker.
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Integrating the uncertainty sweeping Argentina, in the early 1980s, with one woman's realisation of her unknowing complicity in this reign of terror, The Official Story is a deeply moving debut. In the years following the Falklands War the military junta, then in power, ripped Argentina apart with its death throes.
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http://www.1worldfilms.com/officialstory.htm