It’s a bit suspect, to say the least, that Dmitry Rybolovlev, the Russian fertilizer king, bought the future president’s Palm Beach mansion for $50 million more than Trump paid for it just a few years earlier.

The mansion, called Maison de l’Aimitie was in such bad shape that Rybolovlev got permission to tear it down and sell off the land beneath it. I’ve written how this transaction has the marks of a bribery case I followed here in San Diego.

I decided to take a deeper look at Rybolovlev. Turns out, he’s got an interesting past: He spent nearly a year in jail on murder charges. Depending on whom you ask, Rybolovlev is a man who rubbed out a competitor or an innocent man framed for murder by corrupt Russian officials.

The evidence points to the latter. Rybolovlev, born in 1966, came from a family of doctors in Perm, an industrial city in the Ural Moutains. After graduating from the Perm Medical Institute in Russia in 1990 he joined the cardiology department of a local emergency room.

It was the dramatic upheaval after the fall of the Soviet Union that changed his life and the lives of his patients, who could not afford to pay him. Rybolovlev moved to Moscow and became one of the first licensed brokers in the country.

It was the right place at the right time. The Russian government, desperate to raise cash and stave off collapse, and being totally unacquainted with capitalism, began selling off its companies for mere fractions of their value. It was perhaps the single greatest investment opportunity in history.

In 1995, Rybolovlev started buying up shares of Uralkali, a fertilizer maker that was located back in his home region of Perm, the center of the country’s potash industry. He quickly amassed a controlling interest in the company and was named chairman of the board.

In 1996, Rybolovlev was arrested on a murder conpiracy charge. He would spend his 30th birthday and the next 11 months in jail.

[The definitive account of Rybolovlev’s time in jail comes from an interview he gave to the Russian edition of Forbes magazine about a decade ago.]

Rybolovlev was accused of ordering the 1995 murder of Evgeny Panteleymonov, the general director of Netfchimik, which produced industrial alcohol.  Rybolovlev was chairman of Netfchimik and owned 40 percent of the company, according to Forbes.

Netfchimik generated high cash flows — and attracted attention from criminals. In the summer of 1995, Panteleymonov met with Rybolovlev and told him the criminals had to go. Rybolovlev had offered him bodyguards for his protection. Panteleymonov had refused.

Rybolovlev was not so cavalier. He had grown so worried for his family’s safety that he moved them to Florida and then to Switzerland. He hired bodyguards to protect his family, his parents and his business partners. “From time to time, I had to wear a bulletproof vest,” he told the Russian edition of Forbes.

Unprotected, Panteleymonov was gunned down by a mob-linked businessman named Oleg Lomakin (aka Prokop). Lomakin was arrested for Panteleymonov’s shooting, and, oin exchange for leniency, he accused Rybolovlev of ordering the murder.

It was enough to get Rybolovlev thrown in jail, where he languished. Authorities moved from from cell to cell in an effort, he suspects, to break him. Weeks dragged into months. Offered freedom if he sold his shares in Ukrakali, he refused. He told Forbes he was prepared to serve 10 years, if necessary.

Finally, the case against him began to fall apart. No other evidence linked Rybolovlev to the shooting, and eventually Prokop admitted that he had perjured himself. After nearly a year of incarceration, Rybolovlev was allowed to post bail of one billion rubles (about $200,000). In late 1997, he was acquitted of murder charges.

It turned out that Rybolovlev’s arrest was tied to the politics of the fertilizer industry. There was a familiar Soviet problem of overproduction, and to smooth things out the Rybolovlev’s company Uralkali and other fertilizer producers decided to collude. In 1993, they formed the International Potash Company to channel their exports.

Things were uneventful until 1996. On May 20th, Uralkali shareholders voted to end its relationship with the International Potash Company and export the company’s products through an American company, Transammonia.  The next day, Rybolovlev was arrested.

“I definitely came out a different person,” Rybolovlev told Forbes. “I got an understanding of how the world actually works. ” In prison, the businessman realized that the state can ruin his business at any time. Political risks were too significant and could never be neglected.

Freed from jail, Rybolovlev resumed command of his business. In 2007, he listed Uralkali on the London stock exchange and overnight became one of Russia’s richest men. He sold most of his stake in the company in 2010 to three Russian tycoons. Forbes estimates his fortune today at $7.4 billion.