Being investigated by KGB is so categorically different thing than being a KGB officer that I'm not even sure where to start. But sure: Sergei Korolev, the cha

Being investigated by KGB is so categorically different thing than being a KGB officer that I'm not even sure where to start. But sure: Sergei Korolev, the champion of Soviet space programe had his jaw permanently broken in one of NKVD/KGB torture sessions. This later led to his untimely demise.