While it may seem like a good or clever idea in the heat of the moment, lying to a police officer can land you in some real serious trouble. While the Fifth Amendment provides individuals with the right to be free from self-incrimination, otherwise known as the right to remain silent, there is no constitutional right that provides the freedom to lie to cops. Not even the First Amendment’s freedom of speech will protect a person if they are caught lying to police.
The penalties for lying to the police vary depending on the severity of the falsehood and the response/result of the falsehood. Additionally, aside from the differences in criminal law from state to state, lying to federal officers is treated much more seriously and is punished as a federal crime.