A:You're under arrest for concelaing illegal drugs.
B:What do you mean?
A:You are suspected of hiding illegal drugs. So we are taking you into custody.
B:I didn't do anything.
A:We've found some heroin at your house.
B:No, I didn't. I'm innocent. Those aren't mine. Whatever you found is someone else's stuff. You can't prove anything. I wasn't there when you went in, and you can't prove it's my stuff.
A:That may be, but you're still under arrest. And you'd better stop talking.