@JoscelynTransient of course, the jokes about SA in men's prisons have been around for a long time, and the general theme was "it's funny because they kind of deserve it."
Also, of course one would assume that it's going on in women's prisons, but I think, as another person commented, we are led to assume the rule of law protects prisoners. Of course it doesn't, though. This is the rug under which we sweep our problems.
I'm glad the AP could investigate and have some impact.