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Following his February arrest on suspicion of misconduct in public office — the first of a senior British royal since 1649, when King Charles I was beheaded for high treason — Andrew was released after about 11 hours in police custody.—Stephanie Petit, PEOPLE, 1 June 2026 Purists argue nothing beyond eggs, mayonnaise, salt and pepper constitutes culinary high treason.—Paul Stephen, San Antonio Express-News, 1 Apr. 2026 The last was King Charles I, who was tried and executed in 1649 for high treason and tyranny.—Janet Loehrke, USA Today, 19 Feb. 2026 Charles was arrested, tried, convicted of high treason and beheaded in 1649.—Danica Kirka, Los Angeles Times, 19 Feb. 2026 See All Example Sentences for high treason