I had a similar thing happen to me in 2009. I had a great job making good money as a technician at a Ford dealer. I was almost there for 10 years. It wasn't perfect, but pretty damn close! My service writer was a major ass kisser as was his worthless buddy. I got tired of busting my ass while the buddy slacked off. Not only was he lazy, but a terrible mechanic, constantly screwing up and trying to place the blame on others. Yet he was being trained for a promotion? One Saturday morning this fucker came in two hours late and drunk. After he "forgot" to put lug nuts on a vehicle stranding the poor old lady in a busy intersection and he and the writer tried to cover it up, that was the last straw for me and some of the other guys. I went to the service manager's office and reported it. He should have been fired, but since he kissed ass, he was only written up. That was BS as another great tech who worked there 15 years got fired over theft of a half empty can of brake cleaner.
To make a long story short, I went on vacation the following week, all the while these two assholes conspired against me and fabricated "evidence" that I was embezzling money. Even made up fake service orders under my employee number. When I came back, I got fired. No one even wanted to hear my side, etc. Other than fighting them and winning over unemployment pay, I could do nothing about it since NC is a right to get screwed by your employer state aka "right to work."
So all I can say is watch your back at work, TRUST NO ONE, and no one in the workplace is your friend.