MOSCOW — Russian authorities on Sunday confirmed the death of Wagner Group chief Yevgeny Prigozhin, putting to rest any doubts about whether the wily mercenary leader turned mutineer was on a plane that crashed Wednesday, killing everyone on board. [time-brightcove not-tgx=”true”] Genetic testing on the 10 bodies recovered at the crash site “conform to the manifest ” for the flight, Russian Investigative Committee spokeswoman Svetlana Petrenko said in a statement.