Which of the following is NOT a basis for establishing a confidential informant's credibility?

Establishing a confidential informant's credibility typically relies on several key factors that help law enforcement assess the reliability of the information provided. Having a direct relationship with law enforcement is not inherently a basis for credibility. While familiarity can build trust and facilitate communication, it does not necessarily guarantee that the informant will provide accurate or truthful information.

In contrast, first-hand information demonstrates that the informant has directly observed or participated in the events they are reporting, lending weight to their claims. Statements against their own interest can indicate honesty, as the informant risks personal repercussions by providing such information. Lastly, consistency in the information they provide over time can serve to reinforce their reliability, as discrepancies can often raise doubts about their credibility. Therefore, while a direct relationship with law enforcement may aid in operational logistics, it does not serve as a standalone factor for establishing an informant's credibility.