What are the three ways you can establish probable cause?

• A. Personal observation, information obtained from a reliable informant, or through the use of your detector dog
• B. Written testimony, expert witness, and surveillance
• C. Only personal observation
• D. Random guessing

Answer: (A)

Probable cause can be established from three solid sources: your own direct observations, information from a reliable informant, or a trained detector dog’s alert. Each source contributes in a distinct way.

Your own observations provide firsthand, immediate facts: what you personally saw, heard, or smelled that reasonably points to criminal activity or evidence. This direct perception is strong because it comes from your own senses and judgment in the moment.

Information from a reliable informant adds credibility when the informant has knowledge, credibility, and a basis for what they report. If the informant’s information is detailed, specific, and corroborated by independent observations or evidence, it can create probable cause.

A trained detector dog’s alert can establish probable cause when the dog has been properly trained, certified, and its behavior is corroborated by the handler and the dog’s track record. The dog’s alert signals the presence of the odor or substance of interest, supported by the handler’s observations and the dog’s history of reliability.

While other factors like surveillance or testimony can contribute to the overall evidentiary picture, these three sources are the primary ways described here to establish probable cause. Random guessing does not meet the standard.