RE blood blisters
"This rupture is usually caused by some form of trauma, such as pinching."
The electric fence charger we have uses small "pinchers" to connect to the wire fence. But the wounds in the picture seem smaller than they are.
OTOH anyone with a pair of plyers and a wire cutter could reconnect smaller clamps. I imagine the result of a automobile battery charger (Mine can regulate the amount of charge) might cause someone to be unconscious. Dealing in automobile the battery charger would be a must for his business.
Would appreciate you comments on posts 71 & 72.
The reference I posted was due to Karr's first wife waking up with blood blisters on her private parts. Rte66 did not know what Karr's first wife meant by "blood blisters", so I thought I would help her out trying to explain it in general terms.