Stalin's NKVD emissary coordinated with Hungarian General Secretary Mátyás Rákosi and his ÁVH head the way the show trial of Hungarian Foreign Minister László Rajk should go, and he was later executed [REF].
The Rajk trials in Hungary led Moscow to warn Czechoslovakia's parties that enemy agents had penetrated high into party ranks, and when a puzzled Rudolf Slánský and Klement Gottwald inquired what they could do, Stalin's NKVD agents arrived to help prepare subsequent trials.