history: My coworker blamed his bad work mistake on me. My coworker made a mistake and blamed it on me! Seriously? How? What was the mistake? Did you talk to him about it_comma_ or your boss?
current: He used my computer to put in his notes for a ticket he messed up on so it was under my name and not his!
next: That's sneaky... and hard to explain. I'm sorry you have to deal with that hard situation. What do you think you'll do about it?