Yes, but you must sue them in the state court in the county where they reside.
You can, but you have to sue them in the state where the purchase took place. That will mean travel for one of you.
It does not sound like a likely case that would be successful. The child is long grown and on his/her own.
can you sue someone over 18 for assaulting a minor
"Sue" is an old word. It means "ask". So when someone "sues" you in court he/she is just asking the court to award them some of your money or other resources. That can be in any state so long as there are courts.
If the other driver suffered property damage or was injured, he can sue the driver who caused the accident, regardless of the speed of collision.
if they are dumb enough to tell you their real name sue sue sue sue sue sue
Sure, you can sue someone for just about anything. The question is, should you sue them? Were you injured? Was it an accident or was it malicious? If you feel you need to sue then contact a lawyer.
what is the minimum amount you can sue someone at a federal level
No, a minor can not sue their own parent in the state of Iowa. A child can file for emancipation from a parent in the state.
I think you can sue someone if they break the law in their country.
No. How can you sue someone if you're dead? Your heirs could file a wrongful death lawsuit.