Yuchuan Guo was a 30-year-old graduate student at San Francisco State University who was fatally shot in his home on Treasure Island, San Francisco, on May 10, 2017. He was weeks away from completing a master’s degree in international relations when the killing occurred sometime between 8 a.m. and 5:30 p.m. that day. Authorities have not announced any arrests or a clear motive, and the San Francisco Police Department reports the investigation remains open.

Anyone with information about Yuchuan Guo’s death or who may have been in the Treasure Island area on May 10, 2017, is asked to contact the San Francisco Police Department.