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What is a condition under which an officer may act without a warrant?

  1. If they have probable cause

  2. If they feel threatened

  3. If they are in a public place

  4. If it pertains to a civil infraction

The correct answer is: If they have probable cause

An officer may act without a warrant primarily when they have probable cause to believe that a crime has been committed, is being committed, or is about to be committed. Probable cause is a legal standard that requires a reasonable amount of suspicion, supported by circumstances sufficiently strong to justify a prudent person in believing that a crime has occurred. This condition allows officers to take responsive actions such as making an arrest or conducting a search without a warrant, as the urgency or nature of the situation might not allow time to secure one. Other conditions listed, while they may contribute to the decision-making process of an officer, do not inherently grant the authority to act without a warrant in the same legal sense as having probable cause does. For example, feeling threatened could prompt an officer to take action, but it doesn't establish the legal justification required to bypass warrant requirements. Acting in a public place doesn't automatically provide warrantless authority either; context matters significantly. Civil infractions typically require different considerations and often do not warrant the same immediacy as criminal actions supported by probable cause.