Yep, they follow a candidate around videoing/recording everything they do or say as part of "Oppo Research" and to use in campaign ads.
And as far as being able to use lethal force. You have a clear disparity of size and strength. Once he forced his way into the room and went hands-on, she could clearly say she was in fear of her life.
If I was on her jury, I would vote to acquit.