The wife of Russian opposition leader Alexei Navalny says that laboratory analysis of smuggled biological samples found he was killed by poisoning while incarcerated in prison in February 2024. Navalny, Russian President Vladimir Putin's most formidable critic for years, died in mysterious circumstances while serving a 19-year prison sentence on a string of charges widely seen as retribution for his campaigning. Read more: https://ab.co/4gw6BOp Get the news that matters to you straight from the