So a little quick addition shows that's he's cost your dad's company over $40,000 already. Wouldn't it be cheaper to fire his pathetic butt and give him, oh, I dunno, $5000 severance pay?
This is why I am self employed, I work with myself, and those that I chose to work with.
I used to work for Cycle Gear, a motorcycle parts and access retailer. I was with them for about six years. Early on, when I was an assistant manager, I helped hire and interview another guy to be a second assistant. If I had known what a dick he was, I would have blackballed him from the start. He counteracted everything I told someone to do, and he was even rude to customers. One time someone had come in eating some fast food and finished it while in the store. The customer asked if we could throw away the bag and wrapper for them. He said, "actually, no, we don't want any stinky food in here, but there's a dumpster outside at the end of the parking lot, you can just throw it in there."
I about died. The customer stared at him, looked over at me, turned on his heel and left. I bitched him out good for that one.