Nekucheneswa kwevakuru vake paStB mushure mekupinda kweSoviet Union muCzechoslovakia muna 1968
, akazviwana asisataurirani nebasa racho ndokuswedera pedyo neFBI panzvimbo pezvo mukuedza kutiza ndokushandisa zivo yake kurwisa vaSoviet asi vakanga vasingafariri.