HILLSBOROUGH COUNTY, Fla. (WWSB/Gray News) - The man arrested in the disappearance of two doctoral students from the University of South Florida (USF) is now facing murder charges. Hisham Abugharbieh, 26, is charged with two counts of first-degree murder with a weapon in the deaths of his roommate, Zamil Limon, and his girlfriend, Nahida Bristy. Limon was found dead Friday, the Hillsborough County Sheriff’s Office said during a press conference. His body was found near the Howard Frankland Bridge.