Vladimir Putin’s Russia has long been a land of mysterious deaths. In 1998, soon after he had been appointed head of the security services, Galina Starovoitova, a parliamentarian who believed in bringing democracy to Russia, was gunned down in the stairwell of her apartment building in St. Petersburg. In 2006, Anna Politkovskaya, a journalist who had learned too much about the Chechen wars that Putin used to propel himself to power, met the same fate in the stairwell of her apartment building in Moscow. In 2015, Boris Nemtsov, an outspoken critic of Putin’s presidency, was killed by an assassin only steps away from the Kremlin. Other critics barely survived. In 2020, Alexei Navalny, organizer of the only truly national anti-Putin political movement, fell critically ill on a flight from Tomsk to Moscow after being poisoned. All of these victims were Putin’s formal opponents, people who spoke or wrote in opposition to the kleptocracy he built. Since Putin launched his full-scale invasion of Ukraine, a different class of victims—members of the Russian business elite who were …