Does use of a Personal Radiation Device provide probable cause to search a vehicle?

• A. Yes, it automatically provides probable cause
• B. No, it does not provide probable cause; you still need consent, with at least one officer as witness
• C. Only with a written warrant
• D. It triggers a mandatory search

Answer: (B)

A Personal Radiation Device reading by itself does not establish probable cause to search a vehicle. Probable cause means there are enough facts and circumstances to lead a reasonable person to believe evidence of a crime or contraband is present. A PRD reading can raise suspicion, but radiation can come from many legitimate, innocent sources, so it isn’t proof of illegal activity on its own.

To search a vehicle without a warrant, you generally need consent or some other lawful exception. In this context, consent must be voluntary and is typically documented, often with a witness from the officers. A PRD reading alone doesn’t constitute consent, nor does it automatically create a right to search without consent or a warrant. A written warrant would require probable cause supported by facts to justify the judge’s authorization, and a mandatory search is not triggered merely by a PRD reading.