Apart from his killers, and the people who paid them, nobody knows who shot the Yugoslav Defence Minister, Mr Pavle Bulatovic (51), who was murdered on Monday night as he sat having his supper in a football stadium restaurant in Belgrade's Banjica suburb.
Those who know the identity of his attackers are certainly not saying. But this being Yugoslavia, the Balkans mill of rumour, fact and half-truth has gone into overdrive.
Mr Bulatovic, who had been police minister and then defence minister since 1992 under three successive prime ministers, had no bodyguards with him at the time of his death. He died shortly after arriving at the Belgrade Military Medical Academy near to the scene of the shooting. Two companions were wounded but survived.
Mr Bulatovic had been defence minister during the ethnic cleansing of Kosovo carried out in early 1999 by the Yugoslav army, special police and squads of paramilitaries.
He had not, unlike President Slobodan Milosevic and four other top officials, been indicted for war crimes by the International Criminal Tribunal for the Former Yugoslavia, although he was banned from obtaining a visa to any EU country.
The Belgrade authorities vowed to step up the fight against what they called "terrorism". Mr Bulatovic was the latest victim in a series of high-profile killings in Belgrade. The Serb warlord, Zeljko "Arkan" Razanatovic, was assassinated on January 15th. Mr Bulatovic was Montenegrin by birth and considered to be loyal to President Milosevic and the Yugoslav Federal Republic's Prime Minister, Mr Momir Bulatovic, from the Socialist People's Party.
The Serbian Deputy Information Minister, Mr Miodrag Popovic, said the killing could have been carried out by the ethnic Albanian Kosovo Liberation Army, now decommissioned and renamed the Kosovo Protection Corps.
But there are more credible suspicions that Mr Bulatovic was killed by hardline Montenegrins, loyal to President Milo Djukanovic, who claim that since last August the defence minister had been organising paramilitary and Yugoslav army units with the aim of resisting, and then trying to destabilise, the Montenegrin government.
Mr Bulatovic was from the north of Montenegro, where loyalty to Mr Milosevic and resistance to Mr Djukanovic are at their highest.
The third theory is that Mr Bulatovic was killed because of his links to Darko Asanin, a Belgrade criminal. It is likely, according to Western diplomats in Kosovo and analysts in Belgrade, that Montenegrin pro-autonomy hardliners will in any case be blamed for Mr Bulatovic's death, leading to escalating tensions in the tiny province, and a possible Serb retaliatory assassination attempt against Mr Djukanovic, which could finally ignite the much-feared war between Serbia and the last fragment of its Yugoslav federation.