No one is sentenced to death for stealing clever clogs you only go to prison for a few years a death sentence is for those who do crimes like murder or high profile theft
The murderers deserve to die but she cant just kill her ex-boyfriend like that, she shouldn't try to take the law in her hands, she should've complained and he would've got punished by law.
But what if two people commit the same crime and only one gets punished. Is that justice? Death penalties can keep the society safe but what if innocent people get killed and the real culprits don't get punished?