Metro Nashville police says 20-year-old Timothy Wilks was shot and killed in Old Hickory, Tennessee Friday night. The incident happened at the 4300 block of Old Hickory Boulevard at a building with several businesses. Investigators say Wilks and a friend were participating in a “prank” robbery as part of a YouTube video and approached a group of people, including 23-year-old David Starnes, with butcher knives. Starnes later said he was unaware of the prank and shot Wilks in defense of himself and others. No charges have been filed and the investigation is ongoing.