By allowing Russian dossier sources to be outed, it's not an exaggeration to say that Bill Barr doesn't care if these people die.
This is Alexander Litvinenko. He defected from Russia's main intelligence agency and fled to London where he wrote about the misdeeds of the Russian mafia state. Putin's thugs found him an poisoned him. He died. 
Alexander Perepilichny - Russian businessman and whistleblower who was providing Swiss authorities with evidence regarding massive Russian government fraud. Assassinated by likely poisoning.
Sergei Magnitsky - Tax advisor who outed the Russian government in a scheme to defraud the public and launder more than $220 million. Beaten to death in a Russian prison.
Scot Young - Businessman who acted as an agent for Putin enemy Boris Berezovsky. Fell four stories, impaling himself on railings below his apartment in the UK. US officials believe he was murdered by the Russian state.
I could keep going for hours. You get the point.
