Fastest high school kids who never ran a step again after finishing high school? (Ie never ran in college competitively or anything else to do with the sport even though they had the talent )
Without naming any names name your examples.
This was the year 2000 so couple decades ago. We had a guy on my team who was a dickhead. I think he ran 4:22 in the mile and was recruited at a d1. He was a real idiot (for a pickup speeding through school parking lot burning tires), but he had decent leg speed.
There was another guy in my conference who ran a 910 3200m and went to a university in Florida and got hooked on drugs and he never competed again
Those are just some examples off the top of my head