I was a witness to a murder in undergrad myself. Shots happened across the street from my apartment at around 1 am. I heard a few shots, looked out the window and saw someone walking around and then disappeared behind the building across the street, and then heard a few more shots and called 911. Turned out some guy shot his girlfriend in the parking lot and then walked back and shot her a few more times (when I lost sight of him). Neither were students but they came for a frat party down the street. Dude was on the run for about a year till he turned himself in and I eventually had to testify at his trial. I couldn't ID him or anything because it was dark, but I testified to the amount of shots and the timing of the shooting.
I didn't even realize someone had been shot until after the cops showed up and I walked across the street and saw a body on the ground because she was shot on the other side of a building that blocked the view from my apartment. 19 yo girl was killed, pretty jacked up.