Why is my ex being so petty? returning insignificant gifts after telling me to leave him alone?

He has NPD most likely. All the signs are there. Even my coworkers think he’s nuts and unfortunately I had a relationship with him for a long time and we just broke up a few months ago.

Every time we get into an argument it goes to the absolute worst lengths where he threatens to call the police on me and then keeps sending messages even after I stop responding.

He’s telling people in there that I need to leave HIM alone. And that’s exactly what I’m doing but I guess this is part of the smear campaign.

If he wants me to leave him alone so bad (he’s said this so many times before), why is he returning perfume samples I gave him which are so insignificant? And staring at me from afar?
Updates
6 mo
**I work with him as well. So he’s doing this at work. He threw it behind me.
Why is my ex being so petty? returning insignificant gifts after telling me to leave him alone?
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