Can an HR manager dock an employee (chauffeur's) pay for smoking a cigarette while getting the company car serviced at gas station?

I work at a law firm, and my co-worker (who is the senior partner's chauffeur) is basically the office gossiper. He's always expressing his dismay for a lot of the staff members, particularly the HR manager. But sometimes I wonder if he's fabricating the truth in an effort to blow off steam. For example, according to my question above, he said that the HR manager asked him if he took a cigarette break on his way to pick up or drop off the boss. My co-worker admitted that he did smoke a cigarette at a gas station while the service attendant was pumping the gas in the company car. So HR said she's docking five minutes out of his pay for that. Did that really happen, or does my co-worker just hate HR'S guts so much that he's exaggerating how evil she is? I mean, it sounds so far-fetched, as well as the following...

Another time, the chauffeur told me that his paycheck was short. So when he went to the HR manager's office and confronted her, she disagreed, to which he ripped up his pay stub (we get direct deposit) right in front of her to express his anger about her carelessness.

The reason I'm wondering about this is because I don't want to fall victim to a fake co-worker who two-timed me. So I'm trying to stay aware of my surroundings. Is he all bite and no bark, and should I be careful around him?