Which statement about unidentified informants is accurate for establishing probable cause?

Which statement about unidentified informants is accurate for establishing probable cause?

• A. Unidentified sources require corroboration
• B. An unidentified informant can provide probable cause without corroboration
• C. Only a citizen informant can provide usable information
• D. The reliability of an unidentified informant is never considered

Answer: (A)

When evaluating probable cause, the credibility of informants matters. If the informant is unidentified, the information they provide cannot be trusted on trust alone because the source cannot be directly assessed. Therefore, to establish probable cause, the tip from an anonymous informant must be supported by independent corroboration—surveillance observations, physical evidence, or other reliable details that confirm the tip’s claims. This use of corroboration aligns with the totality-of-the-circumstances approach: anonymous information can contribute, but it generally cannot by itself justify a warrant without independent corroboration. The other ideas—that an anonymous tip can alone establish probable cause, that only citizen informants provide usable information, or that reliability of an unidentified informant is never considered—don’t fit with how courts evaluate probable cause.

When evaluating probable cause, the credibility of informants matters. If the informant is unidentified, the information they provide cannot be trusted on trust alone because the source cannot be directly assessed. Therefore, to establish probable cause, the tip from an anonymous informant must be supported by independent corroboration—surveillance observations, physical evidence, or other reliable details that confirm the tip’s claims. This use of corroboration aligns with the totality-of-the-circumstances approach: anonymous information can contribute, but it generally cannot by itself justify a warrant without independent corroboration. The other ideas—that an anonymous tip can alone establish probable cause, that only citizen informants provide usable information, or that reliability of an unidentified informant is never considered—don’t fit with how courts evaluate probable cause.