Dynamical Analysis of a Human Accident

A human accident happened in one prison. While in a servitude work ”A” and ”B” quarreled and suddenly ”A” gave ”B” a blow by a scraper. At the moment, ”B” parried it with his left wrist, but the scraper haft broke and its blade stuck in ”C” while in a servitude work in front of ”B” at a distance about 1.3 meters, and as the result ”C” died. We made scientific research in following dynamical analysis about this matter. 1) Before ”B” stopped the scraper with his left wrist, how did the scraper blade stick in ”C” to come out by centrifugal force? 2) The value of the scraper kinetic energy when the scraper blade would not come out. 3) The value of energy expended upon the wrist when ”B” stopped the scraper with his left wrist. 4) The value of energy when the scraper haft broke. 5) The value of kinetic energy when the scraper broke and its blade came out.