I had a similar experience as a kid and believe me when I say that as much pain and anger I felt at the time, my mom was absolutely devasted because she was the one watching the dog when it happened.

I was driving home from highschool and as I got close to home I noticed a black lab laying on the side of the road. I didn't get a very good look at him but once I got to my house my mom came out frantically saying that Chief was missing and she'd been looking for the last hour. Immediately I knew what must've happened so I drove down the road, got Chief into the back of my truck and drove home.

This happened about a week after his first birthday and it was the most traumatic thing I had experienced in my life at the time.

A few months later my dad got us another black lab, Jet. He was a totally different dog but was a light that our family needed to help us move forward.

Jet passed away a couple years ago at 14 years old and was the best dog a kid could ask for. I still think about Chief and how things could have been different but knowing that I gave Jet my all makes me feel better.

Go easy on your mom OP. Sorry for your loss.