Death Note: Desu nôto2006

L:
[with criminals dying one per hour] It does appear less likely that Kira is a student, but that's not the message he's sending by doing this. Ask yourselves, "Why every hour? And why are all these victims in prisons where they're sure to be discovered immediately? Why not other criminals like before?" I believe Kira is telling us that, not only can he kill from a distance, but he can also determine the time of death.