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Killings by both official and unofficial security forces would climax in the late 1970 s and early 1980 s under the presidencies of Fernando Romeo Lucas García and Efraín Ríos Montt , with over 18,000 documented killings in 1982 alone .
 Fernando Romeo Lucas García, Efraín Ríos Montt
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Answer:
 Fernando Romeo Lucas García, Efraín Ríos Montt