In what Comic does Batman kill Darkseid?

I remember seeing somewhere Batman shoots him with a radion bullet or something, does anyone know what comic thay would be?

Much appreciated, thanks.

It was in Final Crisis.

Final Crisis. I believe it was the second last issue. Oh and Batman didn't kill Darkseid, he shot him with the Radion bullet giving him Radion poisoning. This meant Darkseid was in the process of dying but Batman didn't kill him.

@theocitylegend: I feel like Bats needs a limit, Darkseid has conquered worlds and slaughtered millions. At some point he needs to end someone.

Final Crisis