Jimmy_Bond

So I was playing in Dubky, pretty well geared except for the minor fact I had no bullets. Anyway, while in one of the supermarkets, a geared player ran up to me with an axe, chased me outside, and when I turned around, shot me. And while I was laying unconscious, he said, "Shouldn't have turned around Jimmy". How did he know who I was? Was he hacking or is there actually a way to know who you killed?