Let's say you were given one free murder. It works like this: When you will it to be so, one person of your choosing, anywhere in the world, will suddenly, inexplicably die. There is no pain, the person will not suffer, they will simply cease to be alive. No one will ever know why, autopsy results will show nothing unusual — there will be nothing to connect you to this person's death. No one will ever know you did it unless you tell them, and even then, who would believe you? It's a free murder.
You cannot "pocket" your murder. If you do not use it within 24 hours it will expire.
Given these conditions, would you use it? If so, care to tell us who it would be?