Biszku as a minister of interior was responsible for the reprisals following the 1956 revolution. He was charged with war crimes and other criminal offenses in last October. Apparently, Biszku is also under investigation for instigation to commit crimes against humanity, unlawful detention, high treason and other criminal offenses. (It is possible that the prosecution made up these charges in order to use them as a pretext of delaying court proceedings against Biszku.)
Metropolitan Public Prosecutor's Office spokeswoman Bettina Bagoly indicated that investigators still haven't questioned the suspect, so the investigation has been ongoing against an unknown perpetrator (which is an indication that indeed authorities are delaying the criminal charges against Biszku under the pretext of still investigating the case. This can go on and on until he dies because he is already 93 years old).
(MTI - edited by hungarianambiance.com)