What type of message should the locating agency use if they intend to hold an individual on local charges?

A message indicating "Detain" is appropriate for a locating agency intending to hold an individual on local charges. This type of message serves as a directive clear to law enforcement agencies that they should arrest or maintain custody of the individual based on the local charges. It ensures that the information is communicated effectively across jurisdictions and signals that action should be taken immediately.

Using a "Detain" message is crucial in situations where there are pending charges, as it ensures that the designated individual is not only located but also taken into custody as requested. It emphasizes the urgency and necessity of holding the suspect by establishing a legal basis for their arrest, which is essential in the context of law enforcement collaboration.

The other options serve different purposes. A "Locate" message requests the identification or verification of an individual's whereabouts without the implication of arrest. A "Cancel" message would retract a previous request, and an "Inquiry" message seeks information without necessarily suggesting holding someone. Therefore, these do not convey the clear and immediate requirement for arrest as effectively as the "Detain" message does.