On 3/7/13, he was last seen by a classmate on campus at the College of Staten Island. Before he went missing, he resided at 2352 West 8th St. , Brooklyn, N. Y. , but spent alot of time with his girlfriend at her apartment in N. J. On the day he went missing, he borrowed his girlfriend's roomate's 1998 silver Lexus but it was found abandoned and unoccupied in Somerset, N. J. , on 3/7/13. It is unknown if he was operating the car when it was abandoned. Remains recovered were positively identified as William Gu. Case will remain open in NamUs due to partial remains recovery.