If after a reasonably brief time the police have not developed probable cause and they have exhausted reasonably available means to do so, the suspect must be released.

• A. True
• B. False
• C. It depends on the suspect's flight risk
• D. In all cases, identification must be provided

Answer: (A)

The key idea is that arrest and ongoing detention hinge on probable cause. A person can be detained briefly for investigative purposes if there is reasonable suspicion, but that detention cannot stretch so long that it becomes an unreasonable seizure. If, after a reasonably brief period and after exhausting reasonably available means to obtain more information, officers have not developed probable cause, they do not have a constitutional basis to keep the person in custody any longer. At that point the person must be released.

This rule matters because it protects the person from being held without enough evidence to justify an arrest. The possibility of a suspect being a flight risk or needing to confirm identity does not override the requirement to release when no probable cause has been established after a reasonable investigative effort. Identification requirements do not come into play as a justification for continued detention in this scenario.