Source: https://www.nealdavislaw.com/criminal-defense-guides/fourth-amendment-rights.html
Timestamp: 2019-04-23 18:27:37+00:00

Document:
As an American, you have certain fundamental rights, as guaranteed by the United States Constitution. Among them is the right to privacy and protections against search and seizure, as given in the Fourth Amendment. Let’s help you understand more fully your Fourth Amendment rights.
Such Fourth Amendment protections mean police cannot search your home or your vehicle without an arrest warrant or search warrant, without your permission or without probable cause that such a search would produce evidence in a crime.
That means if you were walking along a street and were stopped by police, officers would not have the right to search you unless such criteria were met. Indeed, police cannot randomly stop and search anyone without probable cause, a warrant or permission.
This also means that if police stopped your vehicle for a routine traffic violation, they would not have the right to search your vehicle based on that fact. Rather, police would have to have probable cause that a crime had been committed and evidence was in the vehicle.
Though the Fourth Amendment provides many protections, it doesn’t cover everything. Police still can search you, your house or your car under certain circumstances. Such searches may be deemed “reasonable” under the law.
The ability of police to conduct a search also depends on where the search is conducted.
An officer at an international border can conduct routine stops and searches of vehicles (United States v. Montoya de Hernandez, 473 U.S. 531, 1985).
After a valid traffic stop, police can let a narcotics detection dog walk around the exterior of the car without probable cause (Illinois v. Cabales, 543 U.S. 405, 2005).
If police have probable cause to believe a car is involved in criminal activity, they can search the car (Arizona v. Gant, 129 S. Ct. 1710, 2009).
Without probable cause, or belief of criminal activity, police can conduct a “pat-down” of a vehicle’s occupants after a lawful traffic stop (Arizona v. Johnson, 555 U.S. 323, 2009).
A state can use highway sobriety checkpoints to detect drunk drivers (Michigan Dept. of State Police v. Sitz, 496 U.S. 444, 1990) but cannot make detection of illegal narcotics the primary purpose of such checkpoints (City of Indianapolis v. Edmond, 531 U.S. 32, 2000).
Police can search a home if indications of criminal activity are in plain view (Maryland v. Macon, 472 U.S. 463, 1985).
Police can search a home if they have probable cause and there are “exigent circumstances,” meaning police have probable cause but lack sufficient time to obtain a warrant (Payton v. New York, 445 U.S. 573, 1980).
Police can search a home if such a search is incident (pertinent) to a lawful arrest (United States v. Robinson, 414 U.S. 218, 1973).
Police can search a home if the owner or occupant grants consent to such a search (Davis v. United States, 328 U.S. 582, 1946).
If police observations of a person’s unusual conduct lead to a reasonable conclusion that criminal activity may be involved, police can stop that person and make reasonable inquiries to confirm or dispel such suspicions (Minnesota v. Dickerson, 508 U.S. 366, 1993, and Terry v. Ohio, 392 U.S. 1, 1968).
School officials do not need a search warrant to search a student who is under their authority, as long as such a search is reasonable under the circumstances (New Jersey v. TLO, 469 U.S. 325, 1985).
Still more exceptions to the Fourth Amendment have arisen in recent years as the federal government has asserted increasing authority to protect national security, and as technological advances have made more information recordable and available.
But the nation’s security still must be weighed against an individual’s right to privacy. This recently occurred when the Supreme Court ruled that police cannot search the contents of a cell phone without a warrant (Riley vs. California, 2014).
So despite many exceptions to the Fourth Amendment, you still have legal rights which protect you against unlawful searches. Such rights can be determined by an experienced criminal defense attorney.
If you face a criminal charge stemming in part from police conducting a search of you, your car or your home, let Neal Davis explore whether your constitutional rights were violated and any evidence found is invalidated.

References: v. 
 v. 
 v. 
 v. 
 v. 
 v. 
 v. 
 v. 
 v. 
 v. 
 v. 
 v. 
 v.