hmmm... I was thinking about ep.5 lately and I think that I found out a lil.
Erika is an accomplice of the real murderer, thus she doesnt violate Knox rule 7: the detective must not himself commited the crime. the reason why the previous murders (from ep 1 till 3) where witch like was because Erika couldn't make it to the island because of the typhoon, Bern-chan gave her in ep 5 the miracle to survive.
or something in that direction ^^;;
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