You could look for police blotters etc to find any evidence of the auto accident (if there was some kind of collision).
You could also call CPS and tell ask them in a theoretical sort of way. When my ex and I were still together, he had started to pass out while caring for the kids. I called CPS about it. Their reply was that they expected me to basically intervene and manage the situation to keep the kids safe, since I was the safe parent in the household, or I could seek to get the other parent removed. It was clear to me that the situation wasn't something I could manage so I got him removed.
I checked the local PD, and they don't have a police blotter on their site, or at least one that's public. And this being a rural area, there's no newspaper or reporting going on. I did find a website that tracks official accident reports and didn't see anything in the area that matched the description of her vehicle or the incident on that date, or the next day, if they reported it late.
I've paid a PI to see what they can dig up about this, if anything, and any other calls to her address over the years.
It appears to come down to whether the homeowner who's mailbox was hit would call the police and at least file a report so there's something in the system, or just replace it.
As far as getting CPS involved, I know they've been called a couple other times on her home due to excessive noisy fighting and arguments. They didn't do anything and closed the file each time. In this case, I could see it going nowhere again, as there's no evidence she was drinking (other than my daughter's testimony), and even if they buy it, I could see them concluding it was an isolated incident (it was her wedding day) and wouldn't happen again. Everytime I've had contact with school counselors, CPS, etc. it seems like they're looking for an excuse to do nothing.
