PRINCETON, Mass. (AP) — A Massachusetts man who pleaded guilty to poisoning a classmate while attending school in Scotland has been sentenced to three years in prison. Telegram & Gazette reports (http://bit.ly/1N9iDIU ) 24-year-old Alexander Hilton, of Princeton, was sentenced in Scotland in July after he pleaded guilty to assault by poisoning. Prosecutors say Hilton spiked American student Robert Forbes' red wine with methanol at the University of St.