On Sunday, she worked her usual lunch shift at the school's dining hall. Later that afternoon, she put on a red parka and jeans and left her dormitory. When she missed classes on Monday, investigators started looking and tried to track her movements. A driver said he had picked up a young female hitchhiker that looked like Welden. Hikers reported they had seen a girl who fit her description getting on the 270-mile path known as the Long Trail around 4 p.m. Others, some from as far away as Massachusetts, caught glimpses of a person who might have been Welden but nothing could be confirmed.