What David LaPell said. Former LEO myself and had several death threats, a couple of which - they meant it - and I took very seriously. I documented them all, so if it came to trouble later, I had it on record those bozos had threatened me previously. I also learned that I wasn't as readily recognized in street clothes, and a quick duck out of the area by me often avoided that, "Hey, I know you..." and the mess that would have followed...