Fsb

John became an FSB agent.

The FSB is secretive.

Elias was approached by a senior FSB officer who offered him a job.

The KGB was the precursor to the FSB.

Possible victims included Roman Tsepov, Putin’s bodyguard in 1990s St Petersburg, who died after drinking tea in 2004 at a local FSB office.

Krasikov, a former high-ranking FSB colonel serving a life sentence in a German prison, was on the top of Moscow’s list of Russian prisoners it wanted to exchange.