@tsarstepan,
This may well be the single worst piece of law advice I've ever read. Disbarred? Seriously? Just how does one go about getting a lawyer disbarred because his client lied to him? I guess I should first ask, are you in America? I guess in third world countries law works a bit differently.
Secondly, I'm always amazed at how righteous people are about other peoples morals when they are sitting at home in their climate controlled house typing on the internet. This dude doesn't want to sit time in county and he's looking for a way out. He asked a question. Do you really think your self-important opinion coupled with your character judgement is going to do him an ounce of good? It has simply made you another voice to ignore. But, you know what? It's your keyboard time, Rambo. Fire away.
Third, without knowing the full scope of the situation, its dangerous to offer ANY real advice outside of your own direct experience. You never know, it may turn out this cop is on probation for doing shady ****, in which case HELL YES YOU LIE! YOU LIE YOUR ASS OFF! But, we don't know the full situation, do we? So, we stick to what we know. Unless, you're a keyboard Rambo of such high moral caliber you can toss down judgment upon others like Zeus chucking down lightning bolts. I'm not in that category, so, you know, I'm just gonna roll with it and tell the dude to hire the best attorney he can afford and offer the question in the form of a hypothetical, "I've got a friend in this situation, what would tell him?" arrangement. The lawyer isn't an idiot. He'll know what you're getting at and HE'LL give you a real answer instead of a bunch of us sideliners. And one Keyboard Rambo.