Here is an article which says more or less what I suggested earlier (http://np.reddit.com/r/MensRights/comments/2y5pim/are_women_just_as_criminal_as_men/), but with more in-depth arguments and better numbers: http://permutationofninjas.org/post/21544144182/on-why-most-convicts-are-men-and-it-probably-has