Sadly, I've experienced something like this before...
In the 70s, my 1st real job was in a sports store. I was 18 or 19 when I started. Hired by the general manager; middle-aged and who I knew from his involvement (coaching, supervision) with sports I was into at the time. I worked at the shop for 6 or 7 years, progressing from rental shop rat to sales/tech in the summer & winter sports venues.
The store always had a chronic problem with inventory loss when I was there. It was a big irritation for the owner. All kinds of stuff - including big ticket items like ski gear and even firearms would vanish. The owner tried everything to control the losses - even hired a private security/detective firm to covertly watch in the store. Losses would subside for a few months, only to become a problem again. But the owner made a serious mistake: he assumed shoplifting was the primary cause of the losses. During my years with the store, I did occasionally find merchandise hidden in one of our dumpsters & I'd always drag the general manager outside to show him what I found. He'd recover the stuff and report it to the store owner. Then the owner would go nuts trying to figure out which employee was trying to steal from him. Yes, some employees were fired based on the "suspicions" held by the general manger on who the culprit was.
I quit the shop shortly after getting my degree at school. About a year later I read in the local paper that the store's general manager was arrested for inventory theft and embezzlement... to the tune of "over a million dollars" over several years. I was curious, so I called the owner (we remained friends after I left) to get the story. It turned out the general manager kept most the inventory he stole - selling little of it (it was, after all, before anything like EBay or Craigslist existed). Where he made most his $$$ was keeping customer receipts at point of sale and then later running those receipts as returns & keeping the cash. THAT was why inventory losses seemed too high.
Anyway, I felt somewhat betrayed by the whole thing. I'd known the general manager for years. He seemed a great guy. Boy, was I wrong.