How is it possible?

Have you read yesterday news?

There was a headless body found around Tuas area...
And the police cannot find the head anywhere...

Dunno where it went too...
Police send out search dog to find the head too... Say... Do the dog fetch the head back to the police or bark when they see the head...
And do dog feel gross about seeing a head?

Anyway... the question i wan to ask is that... How do a person get the head chop off?
Well you see... when u cut a meat... u cannot slice it into half in one chop... a human neck is so thick, it is sure impossible to chop off with a normal knife too...
And all human have hot blood pumping in them... No matter how cold you are... the moment u see a cut on the neck i think it will be too gross to continue... Hence, how is it possible for anyone to chop of ppl head... It just doesn't make sense...

So my guess it that, fish ate the head off, since the body is found near the water i guess it is possible...
I really cannot believe there is human that is able to bare all the sin of chopping someone head off...