Accuracy indeed, and highly unlikely they would be in prison still or indeed since 1992.
Its must have been an interesting part of the world then with Vienna only a few Km from 'the East' even though much of Cz is west of Vienna . Crossing the road border today between what is now Slovakia and Austria is a relic of the cold war days with the actually border several hundred metres inside a sort of sterile strip between the two countries with serious looking border posts set way back from the border line itself and of course nowadays there isnt much difference between roads, houses, cars etc on both sides. I wonder what happened to all the stern faced men in fur hats who used to raise those striped barriers