When an ordinary citizen interacts with law enforcement, it can be unnerving to realize the amount of power an officer wields: they've got the guns, the handcuffs, and the authority. But the Fourth Amendment places limits on governmental and police power. What exactly are those limits, and have they changed in the 21st century?

Cynthia Lee is a professor at George Washington University Law School and author of Searches and Seizures: The Fourth Amendment.

Correction: Cynthia Lee has written one book on the topic of the Fourth Amendment, not several, as stated in the episode's introduction.