The emails were shared in full with Newsweek by Igor Sushko, the executive director of the Wind of Change Research Group, a Washington-based non-profit organization.Previous FSB letters authored by the whistleblower, and published by Osechkin, have been analyzed by Christo Grozev, an expert on the FSB.The whistleblower focuses on Yevgeny Prigozhin, a Putin ally and founder of the mercenary outfit the Wagner Group, and Chechen leader Ramzan Kadyrov.Both Prigozhin and Kadyrov have continued to criticize how Putin's war against Ukraine is being handled, appearing to be siding with each other in rare displays of dissent, suggesting that rifts may be emerging inside the Kremlin.Prigozhin therefore holds a uniquely advantageous position within the Russian state structure and information space that allows him to expand his constituency in the country more readily than the higher military command, allowing him to freely promote himself and his forces while criticizing Kremlin officials or the Russian armed forces without fear of push back, according to the think tank."