Hopefully Mr Putin hasn't tossed out all of the KGB tricks ...I'd hope for fillet knives being used on the murderers...It'd last a very long time.
Remeber what the KGB did when one of the Islamist groups in Beirut kidnapped and killed a Russian diplomat? They found the perpetrator, stuffed his genitals into his mouth and dumped his head on his family's doorstep. For some odd reason, the Russians never lost another diplomat.