Why do have feel yucky after reading this? I hear a lot of typing, but no real info.
When I accused a supervisor of harassment, I did it with much pause. This is not a thing most people relish doing. It tales an awful lot to accuse someone of anything at UPS. You are involving them in your business. HR and Labor will be sniffing around. The union has to get up and come down. The DM might show up. It's a lot of hub-bub. Plus, everyone looks at tyou funny for a while after. The victim is never just a victim.
His(?) BA was informed of the accusation first thing directly from UPS. They forwarded all pertinent papers, as well. I am sure video was looked at, as well as sup being interviewed.
I have no idea who did what here, mainly because the posts are- I think- intentionally vague.
If this person didn't do anything wrong, get off your BeHind and do something. You say you have all the evidence.