[BitWielder1]

She also needs to understand gun laws.
Shoot an invader in your home - good.
Run after an invader and (attempt to) shoot or threaten him - not good.
It's much harder to claim self defense in the second case.
Not impossible but it's a much steeper uphill battle and outcome far from certain.
Especially if you're 16 and not supposed to have unsupervised access to guns at all.

[marktwain]

“Especially if you’re 16 and not supposed to have unsupervised access to guns at all.”

I do not believe that is the case in Tennessee.

However, there is a federal law that requires that you have written parental approval to have a pistol in your possession if you are under the age of 18.

I bet Eric Holder will not prosecute the parent(s) of this girl for violation of that law.