A campaigner credited with helping found the modern gun control movement has killed himself in jail while being held on a DUI charge. Mark Glaze died last month while being held at Lackawanna County Prison in Pennsylvania, with the 51 year-old's death announced in a New York Times story published Sunday. Glaze, a father-of-one, is said to have been suffering from addiction and severe depression in the period leading up to his arrest and death. 'As we celebrate the life of our beloved Mark, we would be remiss not to mention his harrowing struggle with alcohol, depression, and anxiety,' 'In...