I am re-reading The History of Murder by Colin Wilson and am a bit disconcerted with his overuse of "homosexual" when describing people.  By this I don't mean the term itself, but rather I feel he uses it when it has nothing to do with the case or its analysis.  One such usage occurs in the case of Lacenaire, the French killer and thief from the 1800s.  Wilson describes Lacenaire's last victim as a "homosexual letter-begging-writer."  The victim was a bank courier, so his sexual orientation did not appear to contribute to or figure in his death.  Overall, a strange over-usage of the word.

That said, I enjoy Colin Wilson's books and his Encyclopedia of Murder with Pat Pittman is probably my favorite true crime resource.