The death of a Princeton University student from Ohio whose disappearance near the New Jersey campus last fall drew national attention has been ruled a suicide, authorities say. The Mercer County prosecutor’s office announced the ruling in the death of 20-year-old Misrach Ewunetie following completion of an autopsy by the Middlesex regional medical examiner’s office. Her body was found by an employee behind tennis courts on the campus facilities grounds. Prosecutors said at the time that the death did not appear “suspicious or criminal in nature.” An extensive search had been launched after Ewunetie was reported missing almost a week earlier. She had last been seen heading into her dorm room at the Ivy League school.