He turned to Mitya, and delivered himself in a loud, firm, dignified voice: "Ex-Lieutenant Karamazov, it is my duty to inform you that you are charged with the murder of your father, Fyodor Pavlovitch Karamazov, perpetrated this night…."
It was written two days before, and so we know now for a fact that, forty-eight hours before the perpetration of his terrible design, the prisoner swore that, if he could not get money next day, he would murder his father in order to take the envelope with the notes from under his pillow, as soon as Ivan had left.
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The perpetrator has not been captured or identified.
It’s been a year since the crime and the perpetrator has still not been caught.