Probably because they didn't bother with prisons. Chop up the criminal and chuck their parts in the bog. Simple solution.
Please send me a government grant. I am obviously smarter than any German anthropologist.
APf
A worker stacked the sections of turf sliced free by the guillotine-like blade. Suddenly he paused, something having caught his eye. "What's this? An old leather jacket?"
It wasn't. In fact, what the worker had dredged from the moor was a large piece of human skin. It was followed by long bones, a foot, fingernails, an open ribcage and more and more hair, everything colored rust-red by acids in the bog.
Maybe because they get run over by a peat cutting machine with a guillotine-like blade?
Can we make a joint application (no pun intended) to do a differential study? Might even turn out to be criminals run over by peat cutters.
Sacred three [or occasionally four-fold] death sacrifices.
The victims were partially drowned, then nearly strangled and then finally beheaded.
The four-fold could also include stabbing or burning, depending.
The most famous bog man even had a book written about him;
http://www.parlorcity.net/reviews/drprince.htm
He very likely volunteered to be sacrificed for the good of his people.
More info here;
http://www.mesh5.com/tension/febmarch/bog.htm
Not coincidentally, William Wallace's death was symbolically a holdover of the practice.
Rather than having the desired submission effect that Longshanks intended, it awakened the collective subconscious of the Scots and they got -really- p*ssed.
They saw The Wallace then as their sacrificed "Sacred King" and rebelled.
Ain't archetypal/mythopaeic symbolism cool?....:)