The Fourth Amendment prohibits unreasonable searches and seizures. However, a person's 4th Amendment rights are not violated when a police officer stops a them and frisks them without probable cause to arrest, so long as the police officer has a reasonable suspicion that the person has committed (is committing or is about to commit) a crime and has a reasonable belief that the person "may be armed and...dangerous".Specifically, an officer for their own protection, may perform a quick surface search of the person’s outer clothing for weapons if they have reasonable suspicion (not just a hunch) that the person stopped is armed. Although, an officer must confine these kinds of searches to the suspect’s outer clothing; they can not go through the person's pockets. However, if the officer feels something like a weapon during the frisk, they can reach into the suspect's clothing and retrieve it. Even if the object isn’t a weapon, a court will consider it to have been lawfully discovered if it reasonably appeared to be a one. Additionally, if an officer feels something during a frisk that obviously isn’t a weapon but is more than likely could be contraband, they can seize it. That having been said, if the officer can’t tell from a frisk what the object is, only that it isn’t a weapon, they can’t explore further.