I got the police report first, then the death certificate, which listed cause of death. I was unaware that they were even doing toxicology reports on my son, since he was not driving and was the only fatality in the accident. The police report was a huge, fat, thing, but I never got anything else regarding the toxicology reports. I did hear later that the reports showed no substances in his blood (which wasn't surprising since he didn't have any known addiction issues, just the "normal" teenager smoking cigarettes, riding his dirt bike where he wasn't supposed to, etc.). I don't remember how I heard the test results because my memories are a little foggy. There was legal action against the driver, but I was in too much pain to follow it up much. She was just being a nitwit teenager herself and was charged with involuntary manslaughter. I had no part in any of that. It might be different in different states, and since the police are involved in your case, I'm sure it's different. My trust level is low and I would "lawyer up" and get all of the information you can, even if you can't read it right away. All of the newspaper clippings, reports, cards, etc. are in a box and I just haven't reviewed them since they went in the box.
Hugs, light, and love to you. I think of you so often. I'm part of that club no one wanted to join, too.