[quote=@TheWindel]
[@Flamelord]

But...the others haven't seen Chiyo use a knife. Only her revolver.
[/quote]

Mami turned ribbons into muskets. It's not impossible for her to have another weapon.

[quote=@KoL]
[@Flamelord] That's just a lot of metagaming in my opinion. Specially since Chiyo was supposed to be in Mitakihara by now. I bet she can go there and come back by bus in one night, so she might as well have an alibi.

Also she might must say, "Ask the Contractor if I wasn't with him last night?" Kyubey never lies, but he also never tells more than he's asked, to, so she would have a good cover.

Anyway, a new mysterious girl who indeed uses a stabbing weapon will arrive in the city. So you have at least another suspect, not excluding the possibility of yet an unknown girl existing.

SI yeah all that was metagame based theory. In my view and I find it hard that[@TheWindel] or [@MarsAdept] would disagree with me.
[/quote]

While it's a stretch, it isn't that metagamey in my opinion. It follows on a reasonable deduction of facts that the characters in game would know. Is there any part in there that the characters in game would have no knowledge of? 

For example, I can't take into account the possibility of a new MG showing up who uses a bladed weapon in these deductions, when I don't know she exists, even if it's out of character. Which still wouldn't explain how they managed to get the jump on her in her own home, without any sign of a struggle or a chance to fight back. Unless Emiri really was just that trusting of complete and total strangers.

While I admit that Chiyo may not be the prime suspect, she would certainly be up there on the list, if only for the reasons I described and akame's own in game distrust of her.