Vendettas are interesting. In the old days, when criminals were more or less "professionals", they might seek revenge against one of their own, but never against LEO's. There was an FBI agent who worked out a code with the then Mafia in Chicago that familys were off limits on both sides of the coin. Alas, today you have drugies, idiots, and just plain stupid people commiting crimes, and it's all a different story. I had an interesting encounter with one of the last "professional criminals" when I was a cop. He was a second story burglar. Furs was his business, nothing but furs. When he was arrested cutting through a silent alarm on the roof of a department store, it was all, "Yes, Officer, No Officer, Yessir and Nosir." He was unarmed and out before the paperwork was finished on him. Interesting fellow. (That was long before the 3-time loser law.) Might have been a different senario if that was the case.