 In 1999, he was appointed as Head of the Legal Office at the Ministry of Justice by then Minister Jan Carnogursky, where he was tasked with documenting and investigating crimes from the former Czechoslovak communist regime, which contained over 70.0000 individual cases.He was an outspoken proponent of the prosecuting the Slovak politicians responsible for the Warsaw Pact invasion of Czechoslovakia, which he called "the greatest crime in the past 50 years of Slovak history.