true
police and law enforcement
(Answer is applicable to the USA only): A warrantless arrest is never served. A warrantless arrest is performed. Following the warrantless arrest, the arresting individual (typically) or authority is required (usually) to provide the courts with a warrantless arrest affidavit wherein the person making the arrest articulates the probable cause for the arrest, which then is submitted to a judge for review. The arrested person will already be in jail or otherwise in custody (and possibly even bonded out), before the signed warrantless arrest affidavit becomes available to the arrested person.
in your presence the person is actually committing, about to commit a felony
Incident to an arrest
In the manner of the way the actual arrest goes down, very little. The one major difference between arresting for a felony versus arresting for a misdemeanor, is that for a warrantless arrest of a misdemeanant the officer must have atually witnessed the misdmeanor offense take place in order to make the arrest. The only exception to this would be (in jurisdictions that have such offenses) there are certain so-called "Probable Cause Misdemeanors" for which an arrest can be made even if the officer didn't observe them take place.
In order to make a warrantless arrest, a police officer must be given permission to enter or be in an emergency situation. In both instances, the officer must have sufficient probable cause to make the arrest.
The Carroll Doctrine deals with the warrantless search of automobiles by law enforcement agents. The U.S. Supreme Court upheld the automobile exception in the 1925 case Carroll v. United States.
Warrantless searches can be performed when consent is given or there are exigent circumstances. An exigent circumstance is if the police feel that someone's safety is at risk or criminal activity is ongoing. Two other conditions are the plain view doctrine and incidental searches.
it made warrantless surveillince necessary
the police officers use the so called "miranda doctrine". . .
Stopping a vehicle that has broken no law but in only of a suspicion called a warrantless arrest is this not a violation of the 4th amendment. Is this Authorized by Legislation?