Someone tell me, how was she supposed to know he was a cop? If some strange man threatened me with a gun, I'd be terrified, I'd think he was out to rob/rape/murder me, and I would try to to protect my son from him (even if it meant using my car as a weapon)!
*how was she supposed to know he was a cop*
She wouldn’t have known if he was in uniform. She was on drugs, etc. She also had an expired license, Previous drunk driving, and worse.
She put her son in endangerment by her own actions and probably not the first time.