Hisham Abugharbieh was charged Saturday with two murders. The victims are University of South Florida doctoral students Zamil Limon and Nahida Bristy.

Both students are from Bangladesh. Abugharbieh was Limon's roommate.

He was arrested after a standoff with police. Limon's remains were found on a bridge in Tampa, Florida.

Leaders believe Bristy is also dead. Search teams are looking for her near the same bridge. One student is still missing and the search is ongoing.