Matthew Unglesbee, 36, of Quincy, remained in the custody of US marshals on Tuesday on federal chargesCorroborated by 2 sources from 2 publishersuscrime5h agoTL;DRSources1The Guardian (World)https://www.theguardian.com/us-news/2026/oct/27/man-sent-powder-congress-arrest6h ago2Fox News Politicshttps://www.foxnews.com/politics/illinois-man-accused-threatening-congress-white-substances-letters-marked-return-address5h ago