Probable cause is the standard required for which police action?

• A. Detaining a person briefly on suspicion.
• B. Issuing a warrant for arrest or search.
• C. Conducting an undercover operation.
• D. Seizing evidence without a warrant in any circumstance.

Answer: (D)

Probable cause is the standard used when a warrant is requested, because it requires a factual basis that would lead a reasonable person to believe a crime has been committed and that evidence or a person connected to the crime is likely at a given location. This standard is what justifies issuing a warrant for arrest or for a search.

Detentions brief of a person on suspicion rely on reasonable suspicion, not probable cause. Undercover operations involve different investigative considerations and do not hinge on probable cause for every action. Seizing evidence without a warrant is not allowed in all circumstances; there are recognized exceptions (such as exigent circumstances, consent, or plain view) where warrantless seizure is permitted.

So the action that specifically requires probable cause is obtaining a warrant for arrest or for a search, reflecting the protection against unjustified intrusions.