Which of the following is a source of probable cause?

• A. Officers personal observations
• B. All of the above
• C. Information from other officers
• D. Physical evidence

Answer: (B)

Probable cause can come from multiple legitimate sources, not just one. If you notice something directly through your own senses or observations—like a visible weapon or the smell of illegal substances—that can establish probable cause on its own or in combination with other facts. Information received from other officers or reliable tips can also create probable cause, especially when it’s corroborated or consistent with what you observe. Physical evidence you find—such as stolen property or drugs in plain view—can independently support probable cause to act. Because each of these sources can contribute, the option that includes all of them is the best choice. In real cases, the totality of the circumstances, including reliability and corroboration, determines whether probable cause exists.