1  And, by the way, I've met that man Koch.
2  It was just as they pitched on those fellows, Koch and Pestryakov, at first.
3  The murderer was upstairs, locked in, when Koch and Pestryakov knocked at the door.
4  He hid from Koch, Pestryakov and the porter in the flat when Nikolay and Dmitri had just run out of it.
5  Koch, like an ass, did not stay at the door; so the murderer popped out and ran down, too; for he had no other way of escape.
6  Even Koch and Pestryakov did not notice them on their way upstairs, though, indeed, their evidence could not have been worth much.
7  That's just it; the murderer must have been there and bolted himself in; and they'd have caught him for a certainty if Koch had not been an ass and gone to look for the porter too.
8  Early on the third day after the murder, when they were still dandling Koch and Pestryakov--though they accounted for every step they took and it was as plain as a pikestaff--an unexpected fact turned up.
9  He described minutely how he had taken her keys, what they were like, as well as the chest and its contents; he explained the mystery of Lizaveta's murder; described how Koch and, after him, the student knocked, and repeated all they had said to one another; how he afterwards had run downstairs and heard Nikolay and Dmitri shouting; how he had hidden in the empty flat and afterwards gone home.
Crime and Punishment By Fyodor DostoevskyContextHighlight   In PART 6: CHAPTER VIII