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Okay, Sesama, it's not as scary as it seems. Potentially, the cop and the mafia, along with the serial killer, are targeting different groups of people. If the cop killed a town member, then he's to blame. If he killed a mafia member or the serial killer, then it's quite logical that evidence points to him. For now, that's how it is, although I'll think about this issue further.
Saret, accepted. I will limit it, although later.