Putin has been running around the world poisoning people for over a decade. Litvinenko was poisoned with polonium – polonium! – in the UK back in 2006. He died. Yuschenko was poisoned with an unidentified substance. He didn’t die but was disfigured.
This is a very old Soviet practice that started back in the late 1920s. The goal is intimidation. “We’ll find you wherever you go. There’s nowhere on the planet that we can’t reach,” is the message.
Sixty years ago, Solzhenitsyn wrote that the West will tolerate absolutely anything that the USSR dishes out because all it cares about is to be left in peace to continue consuming. He’s still right.