Future_psychologist asked this question on 4/18/2000:

okay, i am doing this research report on this issue. So tell me, why are there more male serial killers than female ones. (and do not just tell me because of the testosterone levels, mention something else and if u have any of the statistics of the ratio between them both).Please get back to me ASAP. *iscicles*

serial_interest gave this response on 5/10/2000:

To be totally honest , I am not an expert in this field but am highly interested. Testosterones , in my opinion, should only effect the murders involving sex crimes. Someone once said "the female of the species is highly more deadly than the male". And also in reference..."a black widow spider eats her lover afterwards" haha. So it seems there would be more female serial killers, but there aren't. There is a book by author Michael Newton you might check out for more information, it contains stories of more than 200 female S.K..I wish I could help you more . Thanks for asking....D.A.L.