Heya mate, that's a terrible way to come to the forum, but welcome.
Very bad encounter, and I don't think on the story you posted it is your fault (entirely).
Without knowing where you are, it's possible some drone rules may have been broken, but that's a poor excuse for someone to be so spiteful (not to mention plain stupid) to smash your drone like that.
I initially thought it must have been a mini, but you mentioned OA ???? She'd be really crazy to try that with a larger drone.
Some people are just sad sacks, and think it's all about them.
Hopefully you've met your one time encounter with such a nut job, and your future will be carefree.
Personally, I would pursue it and file crimal damage charge against her.
1. You have the video proof you weren't flying over her property.
2. She has cut hand showing she did contact your drone as you say.
3. She has phone footage / recording, and this could prove you didn't attack her, and she was totally out of line . . .
Now the big ? is, did the police officer see his, hopefully get a copy ?
She may have selectively turned it off after confronting you, and not videoed the confrontation and aftermath.
The it becomes he said / she said, but I feel her story could be found inconsistent with some facts on record etc.