Answer :
To obtain an arrest warrant, police must demonstrate probable cause. Probable cause is a legal concept that means that there is a reasonable likelihood that a crime has been committed, is being committed, or will be committed.
When police officers have probable cause, they can lawfully conduct an arrest, perform a search or seize an individual or their property. Probable cause is a level of suspicion that is greater than mere suspicion but less than certainty or proof beyond a reasonable doubt. If the police fail to establish probable cause before making an arrest or conducting a search or seizure, the arrest, search, or seizure could be considered illegal.
This means that the evidence gathered during the arrest or search could be suppressed or excluded from trial. The exclusionary rule refers to the principle that evidence obtained through unconstitutional means cannot be used in court. Police officers can establish probable cause by gathering evidence from the scene of the crime or through witness statements.
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