US mercenary Matthew VanDyke has alleged that his arrest in India was linked to Russia's war against Ukraine. He also claims he faced physical assaults and delayed medical care inside Tihar Jail, threatening to expose details of his detention, arrest and the NIA investigation. A Delhi court has allowed a plea filed by American national Matthew Aaron VanDyke, who is facing terrorism-related charges investigated by the National Investigation Agency (NIA), permitting him.