May be useful if we could get someone as high profile as this alerted...but there is a woman, Professor Dame Sue Black, a britbong forensic anthropologist.
In short, her and her lab/team have figured out ways to map and read things like vein patterns on the hands of people who commit crimes while filming the videos in first person. They pretty much use this to identify and catch pedos because in a lot of those vile videos all you can see are the sadist's hands, and they often see the backside of the hands the most.
They basically figured out vein patterns are about as unique as fingerprints and have assisted in accurately identifying pedophiles. They got some neat whizbang tech that helps them analyze all these different features of hands shown in pedo and abuse videos.
My point is, the monkeyfuckers show their hands in a lot of these videos. No coverings or gloves usually. I want them to know that their hands are glowing beacons and can be identified by unique patterns in their skin and veins.
It is definitely probable that hand identification training and technology has been spreading to other law enforcement, mostly for departments and organizations that are doing forensics on child abuse cases. When they have little else to go on, they analyze the hands seen in the videos.
I would like to add that it is shown to be very accurate. Pretty much no two people in the world have identical hand profiles. Even between identical twins, the vein patterns in their hands tend to be different.
Just something to add to the thread. I wonder if Prof. Dame Black could be tweeted at and asked for any advice?