I've only read the last three or four pages but for those who were talking about mad men, I give you the Dnepropetrosk Maniacs
http://en.m.wikipedia.org/wiki/Dnepropetrovsk_maniacs
There's a video of one of the killings leaked online that was used in court. I haven't seen it myself but i've been in the same room as it's been on and hearing it was enough. Apparently, if memory serves me correctly, the guy killed in the video had just beaten cancer.