(By Meghan Cooke, macooke@charlotteobserver.com) A 56-year-old man has been charged with murder after his roommate was shot and killed Tuesday.Charlotte-Mecklenburg police received a report of a shooting just before 5 p.m. at a home on Hornet Drive, off Beatties Ford Road near Sunset Road. When they arrived, police found Richard Dean Alwiel, 49, lying on the kitchen floor with a gunshot wound to the chest.