A former graduate student was sentenced on Friday to 15 years in prison for fatally stabbing a professor at Binghamton University in 2009, the Associated Press reported. The former student is Abdulsalam S. al-Zahrani, a 48-year-old native of Saudi Arabia. The victim was Richard T. Antoun, a 77-year-old professor emeritus of anthropology who served on Mr. Zahrani’s dissertation committee and who was attacked in his officeon the campus, which is part of the State University of New York. Mr. Zahrani, who pleaded guilty to first-degree manslaughter, was found to be schizophrenic but competent to stand trial. He is expected to be deported after he is released.