Download the CNN app Facebook Tweet Email Link Threads Link Copied! A man stabbed four people, one fatally, before he was shot and killed by a Virginia State Police trooper on the Interstate 495 Beltway near Washington, DC, Sunday afternoon, authorities...

By Cindy Von Quednow, Sarah Dewberry, CNN (CNN) — A man stabbed four people, one fatally, before he was shot and killed by a Virginia State Police trooper on the Interstate 495 Beltway near Washington, DC, Sunday afternoon, authorities said. A dog was...