I can't believe it

Today I found out one of my coworkers got let go today. I can't believe it. She was ok but I could hear it in her voice she was kind of upset. My stupid supervisor set her up. I know they don't like her so when she made a mistake. They used that to fired her. People make mistakes no one is perfect in this world. They made alot of mistake and they don't admit it. While I was talking to her she said to me I wanted to get fired but she got fired instead. I still can't believe these bitches will do something like that. I really can't believe it. Human resources never help the workers they only there to help the company. If anything happens go to department of labor. I can't never trust anyone at work. They will  stab you in the back when you are not looking.