I worked at a mall record store in the early 90's. The assistant manager was the one who really pushed to get me hired (or so I'm told). She was cool for a while and then she hired a cute guy and tried putting moves on him constantly.
He was kind of an air-head, so was pretty oblivious, but he and I became friends and would hang out outside of work. This enraged the assistant manager so much that she tried to poison me!
I know this because I often had the inglorious task of mopping the floors, so we'd put ammonia in the rolling mop bucket. Point is, I was very familiar with the smell.
SOMEONE (gee, I wonder who?) had taken a small box of cookies off of my shelf space in the back and soaked them in ammonia, dried them out and put them back, hoping I wouldn't notice. They were still somewhat soggy and the smell was obvious.
She also got the guy fired and tried to set up my other friend to make it look like he was stealing, but she got caught and ended up getting fired.
I looked her up on FB recently. She's surprisingly not in jail!