OMG!...

Heck, several years back when my mom got older, she left the car running, with the keys in it, in the driveway many times. She lived a couple hours away from me. When I went to visit her one time, her next door neighbor stopped me when I first arrived at her house to tell me he walked over and shut off her car several times---with the keys in it. She simply 'forgot' to shut it off. That vehicle had keys!!
It was the beginning signs that it was time for mom to a) stop driving and b) to stop living on her own.
It never would have occurred to me to sue someone because my elderly mother was becoming 'less aware' and forgetful!!! Ridiculous!!!