There is an apparent Manafort-Russia connection to this story. The suspect is (unofficially) identified as Dmytro Malynovskyy who ran on the Party of Regions ticket. Manafort advised its leader, Viktor Yanukovych, in this period: “Three sources told RFE/RL on October 16 that the man arrested in France is Dmytro Malynovskyy, an Odesa businessman who reports say has been wanted by police in Ukraine since 2015 on suspicion of large-scale fraud and forgery in a case involving Defense Ministry property in the Black Sea port city… Electoral records show that Malynovskyy ran for Odesa city council in 2006 on the ticket of the Party of Regions, whose leader Viktor Yanukovych became president in 2010 and fled to Russia when he was pushed from power by pro-EU protests in 2014.” (See RFERL-Miller article below Europol press release.)
The castle is reportedly the Château de La Rochepot: https://en.wikipedia.org/wiki/Ch%C3%A2teau_de_la_Rochepot
On 5 October, the French Gendarmerie with the active support of Europol arrested in Burgundy close to Dijon a high-profile fugitive from Ukraine who was living a lavish lifestyle in France. The suspect is thought to be behind a complex case of international fraud and money laundering. The seizures during the action day alone amount at over EUR 4.6 million and include a castle, a vintage Rolls Royce Phantom and 3 works of art by Salvador Dali.
Earlier in January, the French Gendarmerie initiated an investigation on alleged suspicious transactions surrounding the purchase of a castle which was bought for EUR 3 million by a Luxembourgish company whose ultimate beneficial owner was a Ukrainian citizen suspected of corruption at a large scale in his country.
Given the international dimension of the case, the French authorities rapidly requested Europol’s support. Effective cooperation with the Ukrainian and Luxembourgish authorities revealed that the main suspect was wanted in his country for corruption. He had however managed to evade justice by producing forged death certificates.
During an operational meeting held at Europol between France, Luxembourg and Ukraine, it was established that the suspect was not only alive, but was enjoying a lavish lifestyle in France. The scope of the French investigation subsequently changed drastically: the case went from a case of domestic fraud to one of international money laundering of the proceeds of corruption.
As a result, an action day was planned near Dijon to arrest the suspect, together with his 3 accomplices. On this occasion, Europol deployed on-the-field a number its assets recovery experts to assist the national authorities.” https://www.europol.europa.eu/newsroom/news/french-gendarmerie-arrest-ukrainian-%E2%80%98king-of-castle%E2%80%99-and-seized-over-eur-4-million
From RFERL: https://www.rferl.org/a/high-profile-fugitive-from-ukraine-who-faked-death-held-in-france/29546795.html
“‘High-Profile’ Fugitive From Ukraine Who Faked Death Held In France
Last Updated: October 16, 2018 17:46 GMT, Christopher Miller
A “high-profile fugitive” from Ukraine who faked his death and lived a “lavish lifestyle” in France has been arrested, the European Union law enforcement agency Europol says.
Three sources told RFE/RL on October 16 that the man arrested in France is Dmytro Malynovskyy, an Odesa businessman who reports say has been wanted by police in Ukraine since 2015 on suspicion of large-scale fraud and forgery in a case involving Defense Ministry property in the Black Sea port city.
The sources — a senior Ukrainian official, a Ukrainian diplomat based in the European Union, and a senior official in the EU — spoke on condition of anonymity because of the sensitivity of the subject.
Meanwhile, Ukrainian prosecutors announced they had sent an extradition request to the French authorities for a 36-year-old Ukrainian citizen accused of fraud.
Europol said that the man, whose name it did not release, was detained near the eastern city of Dijon earlier this month, together with three alleged accomplices.
More than 4.6 million euros ($5.3 million) in assets, including “a castle, a vintage Rolls Royce Phantom, and 3 works of art by Salvador Dali,” were seized in the October 5 raid, a press release said.
It said the man was thought to be behind “a complex case of international fraud and money laundering.”
Europol said that the French authorities launched in January an investigation into alleged suspicious transactions surrounding the purchase of a 3 million-euro ($3.5 million) castle in the Burgundy region by a Luxembourg-based company.
It was later established that the ultimate beneficial owner was wanted in Ukraine for alleged “corruption at a large scale” who managed to evade justice by producing “forged death certificates,” Europol said.
One of the Ukrainian sources who confirmed Malynovskyy was the person arrested recalled how Malynovskyy had approached him in person in 2016.
“He came to me when I was in Strasbourg, asking for assistance in fighting for justice,” the source told RFE/RL, adding that Malynovskyy had bragged to him about buying “a castle in Burgundy, knowing I like wine from the region.”
Electoral records show that Malynovskyy ran for Odesa city council in 2006 on the ticket of the Party of Regions, whose leader Viktor Yanukovych became president in 2010 and fled to Russia when he was pushed from power by pro-EU protests in 2014. http://omr.gov.ua/ru/news/856/ Copyright (c) 2018. RFE/RL, Inc. Reprinted with the permission of Radio Free Europe/Radio Liberty, 1201 Connecticut Ave NW, Ste 400, Washington DC 20036. https://www.rferl.org/a/high-profile-fugitive-from-ukraine-who-faked-death-held-in-france/29546795.html
Bloomberg also identifies the suspect as Dmytro Malynovskyi: https://www.bloomberg.com/news/articles/2018-10-16/-dead-ukrainian-found-living-in-castle-arrested-in-french-probe
Emphasis our own throughout.