Enter edgar allen poe...
I then took up three planks from the flooring of the chamber, and deposited all between the scantlings. I then replaced the boards so cleverly, so cunningly, that no human eye --not even his --could have detected any thing wrong. There was nothing to wash out --no stain of any kind --no blood-spot whatever. I had been too wary for that. A tub had caught all --ha! ha!
When I had made an end of these labors, it was four o'clock --still dark as midnight. As the bell sounded the hour, there came a knocking at the street door. I went down to open it with a light heart, --for what had I now to fear? There entered three men, who introduced themselves, with perfect suavity, as officers of the police. A shriek had been heard by a neighbour during the night; suspicion of foul play had been aroused; information had been lodged at the police office, and they (the officers) had been deputed to search the premises.