Twenty-five people were arrested in 2009 over the kidnapping of some 16 wealthy Bulgarians for ransom.
This weekend will show if that means Bulgarians turn to old royalty to solve new problems.
Many Bulgarians remain deeply unhappy over high energy costs, power monopolies, low living standards and corruption.
Nineteen Bulgarians were detained at the time, along with other foreign and local workers.
Once Bulgarians and Romanians can work freely in Britain they will not linger on farms.
Moroccans tend the sunloungers on the beaches and toil on building sites alongside Bulgarians and Romanians.
Mr Kostov is particularly keen that Yugoslavia's new leader should treat the country's 60, 000 ethnic Bulgarians better.
They say that Greek employers treat Bulgarians with Muslim names even worse than those with Slav names.
The Bulgarians won the first leg of the third qualifying round clash thanks to Kostadin Stoyanov's 73rd-minute goal.
Bulgarians are set to vote in a referendum on whether a new nuclear power plant should be built.
In the open-air cafes on a warm summer's evening, Bulgarians are sipping their own cooling drinks and refreshing cocktails.
There are currently 26, 000 Bulgarians and 80, 000 Romanians living in the UK, according to a British Labour Force survey.
Bulgarians don't wait around much to see how their athletes do in Olympic figure-skating or tennis or synchronized swimming.
That has inspired a number of Bulgarians to launch their own innovation-based startups.
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This has both stabilised the lev and revived Bulgarians' confidence in local banks.
Like Mexicans in California, Bulgarians find seasonal employment in Greece harvesting crops for the Greek minimum wage or less.
But then ordinary Bulgarians, who could see where this was leading, started pulling their money out of the banks.
The Turks remember more recent deportations by the Bulgarians, in the late 1980s.
The Bulgarians still want billions in compensation for deportations carried out in 1913.
What scandalises ordinary Bulgarians is that their country, the poorest in the EU, is missing a vital chance to modernise.
It analysed migration from other European countries and the number of Bulgarians and Romanians already in Britain before making its estimates.
Yad Vashem lists 20 Bulgarians among its "Righteous Among the Nations" - individuals who acted to protect Jews from the Holocaust.
BBC: Bulgaria regrets failing to save thousands of Jews in WWII
Ministers are looking to limit access to benefits, health care and housing when freedom to work controls on Romanians and Bulgarians end.
Several thousand Bulgarians work in Libya - mostly as doctors and engineers.
Back then, the Bulgarians regarded Belgrade, Serbia's capital, with its comparatively well-stocked shops and amenities, as more or less part of the West.
He also described attempts to predict the number of Romanians and Bulgarians that would come to live in the UK as "pretty pointless".
Bulgarians and Romanians will gain the unrestricted right to live and work in the UK from December 2013, Home Secretary Theresa May has confirmed.
BBC: UK will not extend Romania and Bulgaria migration curbs
Downing Street said it could not promise the new laws would come into effect before work restrictions on Romanians and Bulgarians are lifted in January.
As 10% of Bulgarian exports go to Greece and Greek banks hold 40% of all loans, it is hardly surprising that Bulgarians are on edge.
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