If it was engraved, it would be on the casing, not the bullet. I imagine many journalists don’t actually know the difference, and most readers probably wouldn’t as well.

That said, I agree, I don’t see why the shooter would spend the time. If there were any markings, I’m going to guess they’re permanent marker, because that’s way easier to do.

My money is on this being completely bogus. I believe they found the rifle (first rule of murder school is to not bring the weapon with you), but I do not believe they found engraved bullets, because that’s kind of ridiculous.