A murder I have thought about for decades.

This has been on my mind a lot lately. Recently my son downloaded the Fleetwood Mac album Tusk for me. I had this as a record many years ago and I remember listening to it one rainy night not long after my wife and I moved into our 1st house. Then on the news we had heard about a young girl being murdered and a mall parking lot. They have never solved the murder, her name was Michelle Martinko. She was a freshman when I was a senior and so she went to junior high while I was in high school. I'd never seen her until that night on the news. She was very pretty and had hair that rivaled Farrah Fawcett's. It was that event that made me realize that evil existed in our world. Up until then I always thought things progressed rather normally. The rainy night and listening to Fleetwood Mac always reminds me of that event.
One of the strange things is that I always suspected one of my classmates had done it. I had no proof or evidence other than these 3 things which would not have meant anything to the case: 1)The artist sketch the police published in the paper had hair that looked just like my classmate's. The face in the artist conception could've been anybody. 2)When we were in school this classmate was known for his inability to talk to women but there was one cheerleader he sort of stalked. Later on I heard stories that he was guilty of at least one date rape. There was also a story of him attempting a date rape and the girl getting away. 3)The final fact that convinced me was that he lived and grew up one or 2 houses away from this girl. If he was obsessed with her, I could see him committing the crime. Of course none of this was "evidence" and I always assumed the police were competent enough to consider him as a person of interest. That was in the late 70's and the crime was never solved.
Since the crime the parents have been in the paper a number of times expressing a desire to still have the crime solved. Since that time the mother has passed away and I'm not sure about the father. This Fleetwood Mac album and especially the song Sarah remind me of that time even after all these years. It's been decades since I've seen this classmate and I heard he moved to the East Coast after college. Everything I know I heard secondhand or just thought possible. I wish the perpetrator would acknowledge the crime. Even a deathbed confession would be good.
If this were a TV show some vigilante would kidnap the suspect and somehow find a truth serum and administer it. Of course TV shows are not real and imagined things are much easier than they are in real life.