Generally, a CI's identity need not be disclosed unless the CI's information only was used to get the warrant, or the CI is a witness to the arrest (in limited circumstances).
"Proving to be accurate" is not the test.
This is a criminal defense question. I added tags to help you get a response.
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I don't know what you mean by "have to be permitted." The identity of the CI will be protected at all costs. There is a special hearing your attorney can request to try to get at the identity or at least the type of information he provided, but judges rarely force a CI's identity to be revealed.
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