My wife and I have each had an instance where a dash cam may have helped us. I was hit and run by a teeneger but luckily they found her, too bad she had no insurance. And my wife was hit by a guy going to work that crossed over into her lane. Cop said he couldn't determine fault so we were left to fix our car out of pocket.
I did some shopping and if I remember a good one can be had for around 100, some record forward and back. Wife keeps saying we should get one and after writing this its making me feel like it more.