How Is It Not Yours If It Was Up Yours?

I've watched lots of episodes of Cops in my day. Many many times, people say the drugs cops find in the car, or in the backpack, or even in the pocket of the guy's pants who they're arresting don't belong to him. But never, ever, have bags of drugs been pulled from someone's butt crack and the person's said that isn't theirs. Even better, after the cops found a bag of weed and a bag of crack sticking out of Raymond Stanley Roberts's buttocks, he said the weed was his, but the crack wasn't. Um, you're shoving someone else's stuff up there? Riiight.

I wonder how long he'll try and stick to that story.