Which of the following is an unacceptable source for documented data for detainee classification?

The unverified personal opinion of officers is considered an unacceptable source for documented data for detainee classification due to its subjective nature. Detainee classification relies on verifiable, factual information that can be cross-checked to ensure accuracy and reliability. Unlike an official police report, an order to detain, or charging documents, which all provide objective, documented, and legal foundations for classification, a personal opinion lacks the necessary documentation and verification. This makes it potentially biased and untrustworthy, which is critical when making decisions that can affect an individual's rights and treatment within the detention system. Therefore, using such unverifiable opinions could lead to inconsistent and potentially unjust classifications of detainees.