Seems like it was OHP, but it's been so long now I don't want to swear to it.
It was Charlie Hanger IIRC. I heard he retired from OHP and became a County Sheriff. Don’t know if he still is or not.
I read that McVeigh had applied for Army Special Forces and didn’t make it. Disgruntled at the rejection he finished his hitch and left the Army. Supposedly he was photographed standing in the crowd of spectators when the Branch Davidian burned. That and being rejected by the SF and was said to be his motivation of the Okc bombing.
As I said, that is what I read from different sources and I don’t know if any is true or not.
There is one thing that still puzzles me to this day. He was stopped after the bombing. He was armed and knew he had nothing to lose if he was caught. When he was stopped, why didn’t he try to take out the Trooper and escape?