To the family of the murdered footballer, my deepest condolences.
To the murderer: It's only a game. Does the grief and suffering that you have brought upon the family of the dead footballer make your action worth it? Not to mention the fact that you have to live with the consequences of your action for the rest of your life? It will forever be a stain on your character. Of course, you will be going to jail, but you will also have to live with what you have done.