Death Note: Desu nôto2006

Light Yagami:
In this world, there are very few people who actually trust each other, and it's no different for the police, you know. What's especially important is that L and the investigators don't trust each other at all. Think about it. Could you trust someone whose name and face you don't even know? When L discovers that I'm somehow getting confidential information, he'll be obligated to start investigating the police to find the source of the leak. When that happens, it'll only be a matter of time before the police start resenting him. On the surface, it will appear that L and the investigation team are working together to try to catch me, but in reality L will investigate the police and they will be investigating L. I'm not the one who's gonna find L. I can let the police do that for me; and when they do, that's when I'll eliminate him.