In my experience, they will call you into the office and yell at you, not consider anything you have to say. I was called a lying goody 2 shoes. After your sup, center manager, division manager and a few others have made total asses of themselves trying to convince you what a turd you are, when it comes back down the pipe that you did nothing or nothing can be proven, you'll never hear another word about it.
Hang in there. Always take a union rep to any meetings with management.
These are my opinions. Others are available.