The 21-year-old man who was shot and killed after entering Mar-a-Lago with a weapon was a recent high school graduate who started an artwork company last year that specialized in handmade drawings of golf courses. The man, Austin Tucker Martin, of Cameron, N.C., was confronted by the Secret Service and officers from the Palm Beach County Sheriff's Office inside the north gate of Mar-a-Lago, President Trump's residence and private club in Palm Beach, Fla. Mr. Martin was carrying what appeared to be a shotgun and a fuel canister. Officers told him to drop the items, but he put down only the canister and was shot and killed after raising the shotgun to a "shooting position," the authorities said.