According to ISP's report, Alexander was attempting to pull someone over near the Poseyville exit on June 30th, but that attempt went terribly wrong.
He overcorrected and lost control of his car, crashing into a Louisville couple.
The couple is healing from injuries. A witness who saw it all, shares his reaction.
Driving along I-64, Marty Fisher, witnesses it all in his rearview mirror.
"I was watching in my rearview mirror the whole thing. I could see him fish tail twice. At that time I'm watching pretty steady in my rearview mirror," says Fisher.
Indiana State Police Trooper, Wes Alexander, loses control of his car, crosses the median on I-64, and crashes into a car carrying Sherri and John Jones.
"When he lost control, he must have caught pavement and just shot across that median and car at a pretty nasty speed," says Fisher.
The trooper suffered minor injuries. Sherri remains in fair condition at Deaconess, and John is in good condition. After weeks of worrying, this witness is relieved to hear the good news.
"I really didn't know how it was going to turn out. When you said earlier today that they were doing good and fair, I was really happy to hear that," Fisher says.
Fisher believes the trooper made a poor decision during his pursuit. The report shows Alexander pulled into a construction zone to chase a speeding car.
"I agree with why he went after him, but I just thought the tactics could have been done a little different," says Fisher.
He hopes it's a lesson learned for an officer early in his career.
"I've talked to other troopers that I know. When you are younger and being an officer, everything happens kind of fast. As you mature and age, I think a lot of them decide, is it worth doing this for this, or do you slow down a little bit and catch the guy two miles down the road instead of five hundred yards down the road. I think that comes with age, like any job. You learn from your experience, and hopefully this guy will learn from it and move on."
It's an accident, he says, will always play back in his mind.
"I think it's always there. When I drove there just three or four days after, I could see the whole thing happening again. I think it's always in your mind."