OPINION: When somebody is murdered and his killer is unknown, the detective's first step is to ask: Who had a motive? In classic murder-mystery novels and films, the usual answer is almost everybody. That's the only way to keep the plot going for 250 pages or 90 minutes. But in real life, the suspects are generally few, and pretty obvious.
So who killed Chokri Belaid?
The Tunisian human-rights lawyer and political leader was assassinated outside his home as he left for work on February 6, and the country immediately erupted in violent anti-government demonstrations.
His wife, Basma, said she would file murder charges against the ruling Ennahda Party and its leader, and the mobs in the street chanted the mantra of the Arab revolutions, "The people want the fall of the regime".
But the regime in question is the democratically elected government of a country that has already had its revolution. Tunisia was the birthplace of the Arab Spring.
It held its first free election on October 2011, to elect an assembly to write the new constitution. The winner, as in a number of other Arab countries, was a moderate Islamic party.
The Ennahda-led transitional government has made some mistakes, but it has shown no desire to subvert democracy. Indeed, the Islamic party formed a coalition with two secular Centre- Left parties after the election and, before Belaid's murder, it was in talks to broaden the coalition and bring in other parties.
Those other parties have now walked out of the talks, demanding the cancellation of the results of the 2011 election.
That certainly does not serve Ennahda's interests, and the violent protests in the streets are even more of a problem, since they might trigger a military intervention to restore order.
(The Tunisian army is strongly pro-secularist.)
In terms of motive, Ennahda has none. So who would benefit from killing Belaid?
One suspect is the Salafists, religious extremists who despise the Ennahda Party and hate militant secularists like Belaid. Many in the secular camp criticise Ennahda's founder and leader, Rashid al-Ghannushi, for failing to "crack down" when Salafist fanatics attack peaceful political gatherings, and he must bear some blame, but that's still a long way from plotting a murder.
Al-Ghannushi is reluctant to treat the Salafists as enemies, even though they are, because they both compete for the votes of pious Muslims. But he also argues that mass arrests and torture of Salafists in the style of the old regime are immoral and counter- productive. Just track down the ones who have committed crimes.
Did the Salafists commit this crime? Possibly. Killing a militant secularist would be emotionally satisfying to them, but they are not the leading suspects in Belaid's murder.
The prime suspect is the old ruling elite, people who served the former dictator and have been deprived of power and opportunities for graft since the revolution. They can only regain their privileges if democracy fails, so violence in the streets, extreme political polarisation, the discrediting of an elected government, and a military take- over are precisely what they need.
The Constitutional Democratic Rally, the party whose members served the dictator and were rewarded by him, was banned after the revolution, and some of its members are in jail or in exile. But there are still others around, and it would be astonishing if they were not plotting a comeback.
The only viable route to that goal is to stimulate a civil war between the secular democrats and the Islamic democrats.
If this is where the logic takes us, why are some of the secular parties taking to the streets? In some cases, no doubt, grief and rage have led them astray. In other cases, however, there is probably the cynical calculation that this is the most effective way to hurt the Islamic party, even if it had nothing to do with the murder.
Ennahda's response has been less than coherent. Prime Minister Hamadi Jebali, shocked by the murder, offered to replace the government with a cabinet of technocrats and call early elections, but the party's founder and leader, al-Ghannushi, said the government should stay in place and track down the murderers.
Jebali is sticking to his guns, and the outcome is far from clear. The whole thing is a mess, and Tunisians are concerned that their revolution has lost its way. But there is quite a good chance that they will be able to get the process of building a law-abiding democracy back on track without a major disaster, and it's certainly far too soon to say that their revolution was a mistake.
Gwynne Dyer is a journalist based in London and his articles appear in more than 40 countries.
- Taranaki Daily News
Is high tea at a funeral parlour your cup of tea?Related story: High tea... in a funeral parlour