Which of the following is a power a police officer may not exercise under LEPRA without a warrant?

Searching a vehicle without a warrant typically requires specific grounds, such as the officer having a reasonable suspicion that the vehicle contains evidence of an offense, or that there are circumstances that justify an immediate search under exigent circumstances.

Establishing a crime scene, preserving evidence, and questioning witnesses are powers officers may exercise under LEPRA even in the absence of a warrant, as these actions are aimed at maintaining the integrity of the investigation and ensuring public safety.

Therefore, the correct answer emphasizes that searching a vehicle involves a higher threshold of conduct that necessitates a warrant unless exceptional circumstances apply, highlighting the balance between law enforcement duties and individual rights.