I guess it's just a weird coincidence that people who oppose Putin end up dead in mysterious circumstances.
Article from 2017:
(Source).
Article from 2017:
Last Thursday, Denis Voronenkov, a former Russian lawmaker who had fled to Ukraine and become a strident critic of Russian President Vladimir Putin, was shot dead on a Kiev sidewalk in broad daylight. A few days earlier, Voronenkov had told The Washington Post that he and his wife knew they were in danger. "For our personal safety, we can't let them know where we are," he said. "The system has lost its mind. They say we are traitors in Russia."
...Voronenkov is one of a handful of Putin critics and Russian diplomats who have died suddenly and sometimes mysteriously in the past few months. "I have an impression — I hope it's only an impression — that the practice of killing political opponents has started spreading in Russia," Gennady Gudkov, a former Russian lawmaker and security services officer, told The Moscow Times.
(Source).