Capital Punishment

Who's right is it to choose weather we should go on? Each year in America there are about 250 people added to death row and 35 executed.The death penalty is the harshest form of punishment enforced in the world today.   But does anyone have to right to kill? And what if that person is inocent? The bible has many verses relating to death;

Exodus 20:13 "Do not commit Murder", isn't this murder

Jeremiah 13:1 "The Lord told me to go forth and buy linen underwear...", That had nothing to do with the topic

Luke 23. This whole chapter talks about jesus's death, and this is the only murder that was "right" in the eyes of god, because he died for a reason and was justiflied.

What about the family of the criminal, the people that are going to suffer the most are the parents because they will have to go though all the steps of a close one dying (denial, ect). And the victim is going to feel nothing.