How wide-spread was detainee abuse?

Here's what a new report from HRW says:

[Our researched] has documented  more than 330 cases in which U.S. military and civilian personnel are credibly alleged to have abused, tortured or killed detainees. These cases implicate more than 600 U.S. personnel and involve more than 460 detainees.

Of course it's hard to be sure about the numbers, since the administration and Republican-controlled Congress refuse to empanel any independent or overarching investigation. 

Just another day in the age of  the Frozen Scandal...