GypsyPilot
Mohawk Town
Having seen the carnage of a fatal accident and been through the investigative portion of it, I cannot emphasize this enough. It's mentally and emotionally draining to do. It might be different when it's not someone you're familiar with (such as being a full time investigator), but it's not an experience for the faint of mind/heart/stomach.
I remember the final turning point for me... My boss and I were in a meeting with several other investigators, and they were joking about some of the more infamous trauma events they've encountered. At first I was outraged, thinking what heartless monsters. But they weren't (my boss was a very good and caring person), this was just how they deal with it, somehow depersonalizing the experience. It it a necessary frame of mind for that business, or else I think you'd end up a real mental basket case by the time you retire.