Louisiana State University said it was investigating the death of Maxwell Raymond Gruver, 18, after he was taken to a hospital from a fraternity.
A teacher confronted the student, Daniel Barrow, on Thursday after seeing him in an online video with a gun, the police said. Mr. Barrow was arrested.
The university released the earliest known recording of Kennedy this week, from an English class he was taking when he was 20.
The magazine settled with a University of Virginia administrator who had said the retracted November 2014 article portrayed her as the “chief villain.”