On 17 November 2006, following an order by judge Roberto Timbal, Bordaberry was placed under arrest along with his former foreign minister Juan Carlos Blanco Estradé. He was arrested in connection with the 1976 assassination of two legislators, Senator Zelmar Michelini of the Christian Democratic Party and House leader Héctor Gutiérrez of the National Party. The assassinations took place in Buenos Aires but the prosecution argued they had been part of Operation Condor, in which the military regimes of Uruguay and Argentina coordinated actions against dissidents. Timbal ruled that since the killings took place outside Uruguay, they were not covered by an amnesty enacted after the return of civilian rule in 1985.