ELKTON - New evidence against an Elkton man accused of locking up the mother of his children for six years until her death has prompted a Cecil County grand jury to increase the charges against him from manslaughter to second-degree murder. John Joseph Dougherty, 53, told authorities that he started keeping Mary Elizabeth Kilrain, 46, in a bedroom in 1999 after she suffered an aneurysm and became verbally aggressive toward their daughters, according to police. He told authorities that he wanted to keep her from wandering around the house. Kilrain did not have access to food, water and hygiene, prosecutors...