Hisham Abugharbieh, a 26-year-old suspected of murdering USF doctoral students, has been charged with two counts of first-degree murder related to the disappearances of Zamil Limon and Nahida Bristy. The Hillsborough County Sheriff's Office responded to a domestic violence incident at a home in the Lake Forest subdivision in Tampa shortly after 9 a.m. and Abugharat was arrested after an hours-long standoff. The victim was identified as a younger, immediate family member of Abughatigh.