That is hard to take. While I was in the Service, my ship was involved in Operation Picket Fence. Our mission Pickup Cubans on rafts coming to America. We picked up over a 1000 per Ship out there a week, but we were not perfect, we did miss some. On our way back to our home port we found a raft with a Mother and baby onboard off of NC. 12 years later, it still brings tears.

My first day in a truck (after school) was when I saw my 1st real truck wreck. I was with another driver catching a ride from Tulsa to Ohio to meet up with my trainer. We came across an accident where the truck had lost control in the rain and started sliding. The tractor ended up being wrapped literally around the concrete base of a light pole in the median. The drivers door was against the concrete and the front tire was touching the rear drive tire.

Seeing that on my first day out really, really got to me. I lasted one week because of being shook up over it. It was about 3 years before I could get back into a tractor trailer (drove 6 + 10 wheelers in that time).

Well after driving a tow truck for 10 years, I saw alot of fatalities. Decapitations, people thrown the windshield, homicides, suicides, people who die in their vehicle while it is parked, some guy who had been murdered and stuffed into a trunk and left there for 2 weeks before someone noticed the strange smell coming from this abandoned car, etc etc etc...
I never lost a minutes sleep over it, never had nightmares etc. The first load I took , I got stuck in traffic for a "yellow sheet special" in Tenn.
A local dump driver t-boned a Toyota Corolla on a rural highway.

It didnt faze me at all. Someone once asked me how I deal with seeing people who have died as a result of a traffic accident. I told them, I dont deal with it, because there is nothing to deal with. My job is to recover the vehicle and open the road, not stop and stare at a corpse so consequently, my mind is in work mode, not spectator mode and so I never saw anything other than a car that needed to be removed.