With the death penalty, why the judge breaks the pen?

Almost we see in the film, after the execution of the death, the judge is breaking his pen. And think of it, it is in any law, or is there a dramatic expression? Let's see, what are the reasons behind this Basically, the breakdown of the Nun is a custom or custom that comes from the British era, which is basically a symbolic subject. The first explanation is that the pen has written the verdict of one's life, She can not decide on someone else's life. The second interpretation is also pretty nice It is said that the judge also touched the sadness of his judgment. He was also pained. But that is said to be:
With conviction
If the criminals are crying, they should be hurt
The best she is to judge.
On whose side there is no pain in life,
His persecution of tyrannical oppression.