Here is an old question that just will not go away. And it is amazing how many people will ask this question and then argue with you about the correct answer. The answer is absolutely the police can lie to you.
They can lie to you about the evidence they have, about people statements and when undercover they can lie to you about even being a police officer.
No this will not result in a case being dismissed because they lied. It is perfectly legal and the courts have consistently ruled it is a non issue for police to lie. I have even done it to gain evidence.
The only problem with lying as a police officer is if the suspect knows your bluffing you have pretty much shown your hand that you do not have a case against them.
