Section 2.2: Exceptions to the Warrant Requirement

Exceptions to the Warrant Requirement

While the Fourth Amendment generally mandates that law enforcement obtain a warrant prior to conducting a search, courts have recognized several specific exceptions. The government bears the burden of proving a warrantless search falls within an exception. Minnesota officers must understand these exceptions to ensure evidence remains admissible.

Consent Searches

For a consent search to be valid, consent must be voluntary, determined by the 'totality of the circumstances' (Schneckloth v. Bustamonte). Consent cannot result from coercion, duress, or submission to authority. Officers need not inform a suspect of their right to refuse consent, though doing so supports voluntariness.

The suspect defines the scope of consent and can limit or revoke it at any time, requiring the search to stop immediately. Third-party consent is valid if the third party has actual or apparent authority over the area (e.g., common authority). However, under Georgia v. Randolph, if two co-occupants are present and one consents while the other physically objects, officers cannot conduct a consent search of the shared areas.

Plain View Doctrine

The plain view doctrine allows warrantless seizures if:

1. The officer is lawfully in the viewing position.
2. The officer has a lawful right of physical access to the object.
3. The incriminating character of the object is 'immediately apparent' (establishing probable cause).

Under Arizona v. Hicks, officers cannot move or manipulate an object to expose its incriminating nature. For instance, if an officer lawfully enters a home and sees a handgun on a table, they can seize it if its illegal status is immediately apparent. If the officer must pick up the gun and run serial numbers to determine its status, the manipulation constitutes a separate, unauthorized search.

Exigent Circumstances

The exigent circumstances exception applies when delays in obtaining a warrant would endanger safety, permit escape, or result in the destruction of evidence. Courts recognize three categories:

• Hot Pursuit: Officers in active pursuit of a fleeing felon may enter a private residence to apprehend them.
• Destruction of Evidence: Officers may search if they have probable cause that critical evidence is about to be destroyed.
• Emergency Aid: Under the emergency aid doctrine, officers may enter a home to assist individuals threatened with imminent, serious harm.

In Minnesota, courts apply the 'Olson factors' (State v. Olson) to evaluate exigency, analyzing offense gravity, whether the suspect is armed, and escape likelihood.

Search Incident to Lawful Arrest (SILA)

When making a custodial arrest, officers may conduct a warrantless search incident to that arrest (Chimel v. California). The scope includes:

1. The arrestee’s person (including clothing and pockets).
2. The area within the arrestee's immediate control (their 'wingspan').

The justifications are officer safety and preventing evidence destruction. For vehicles, Arizona v. Gant clarified that officers may search the passenger compartment incident to arrest only if:

• The arrestee is unsecured and within reaching distance of the compartment at the time of the search; or
• It is reasonable to believe the vehicle contains evidence of the offense of arrest.

Automobile Exception (Carroll Doctrine)

Under the Carroll doctrine (Carroll v. United States), officers may search a vehicle without a warrant if:

1. The vehicle is readily mobile.
2. Officers have probable cause to believe it contains contraband or evidence.

The rationale is that vehicles have a lower expectation of privacy due to mobility and regulation. If probable cause exists, officers may search the entire vehicle, including the trunk, and any containers (locked or unlocked) that could conceal the object of the search (Wyoming v. Houghton).

Inventory Searches

An inventory search is an administrative, non-investigative procedure to catalog the contents of an impounded vehicle or property. The purpose is to protect the owner’s property, protect police against claims of loss, and protect officers from danger. To be valid, officers must follow a standardized, written departmental policy. It cannot be used as a pretext for an investigative search.

Realistic Scenario

Officer Benson stops a vehicle for speeding. Upon approaching, he smells a strong odor of burnt marijuana and notices the driver, Davis, has bloodshot eyes. Benson arrests Davis for DWI and secures him in the squad car.

Under Arizona v. Gant, Benson cannot search the vehicle incident to arrest for DWI unless he expects to find evidence of the DWI (e.g., open containers). However, under the Carroll doctrine, the strong odor of marijuana provides probable cause that the vehicle contains contraband. This allows Benson to search the passenger cabin and trunk. In the trunk, Benson finds a locked backpack. Because a backpack can hold marijuana, Benson is permitted to open it. If Benson finds cocaine inside the backpack, the seizure is lawful under the automobile exception.