PARIS — A man arrested by French police earlier this week is thought to be the fourth member of the team that stole France’s crown jewels in a brazen heist from the Louvre Museum, the Paris prosecutor said Friday, meaning that the entire gang is now believed to be in custody.

Prosecutor Laure Beccuau, whose office is heading the investigation, said the 39-year-old man has a criminal record, with six previous convictions.

He has now been handed preliminary charges of robbery by an organized gang, punishable by 15 years imprisonment, and criminal conspiracy, which can carry a 10-year sentence if he is convicted for his suspected role in the stunning Oct. 19 theft at the world's most-visited museum. The robbery gang's haul of loot was worth an estimated 88 million euros ($102 million) — a m

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