Relatives of a missing former Brown University student have come to Providence to try to find him. City police are also searching for Sunil Tripathi, 22, who was last seen Saturday near his apartment off Angell Street. Tripathi’s sister, Sangeeta, told WJAR-TV that her brother left his phone, wallet, and other belongings in his apartment. She said that her brother is going through a very sad time and that his family is worried about his health and well-being. Sangeeta Tripathi said her brother had been studying philosophy at Brown before taking time off to get his life in order.