The Tell-Tale Heart Cunning and Cleverness Quotes

How we cite our quotes: Citations follow this format: (Paragraph)

Quote #4

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! (8)

What exactly does the narrator use to do the dismembering? He makes no mention of disposing of the cutting implement. Is he being cunning, or did he just forget to mention it?

Quote #5

The officers were satisfied. My manner had convinced them. (9)

Has the narrator outsmarted the police officers, or are they hanging out with the narrator because they suspect him?