How do I delete files from Trash after deleting a user account on MacBook Air?

I have tried

1. option key delete
2. using terminal
3. booting into safe mode
4. moving the file out of the trash (it won't let me, it says it needs to be downloaded)

What happens when I try to empty? I get a message saying a file is in use and cannot be deleted. So I click on skip or continue and then it says the same about the next file, for 100s and 100s of files.

however when I try to look inside the folder or click on get info, its appears to be empty.

If I try to move the file out of the trash

Yes, that whole account and everything has been deleted. Everything‘s been gone for a long time. And that file is just the first of hundreds and hundreds of files that pop up with every imaginable name.

I believe this whole thing started when I deleted a user account on my MacBook and then went back and deleted associated accounts with Microsoft office