Many people believe that if you ask an undercover police officer if they are a cop, they are required to tell you. This is simply not true. Police officers often go undercover to gain information on drugs and drug crimes without the presence of a uniform.
Many also falsely believe it is illegal for undercover cops to initiate a drug sale without suspicion or ask for a drug by name.
These myths are based on the belief that it is illegal for an officer to entrap a citizen into committing a crime. While the claim of entrapment by police can be used a defense in a drug case, it is usually unsuccessful. This defense generally works only if the police officer creates a criminal plan, plants the idea into another and instigates the crime to prosecute the suspect.