When will the court order an in camera review of an in-camera review of a child abuse file?

When such documents are subpoenaed, as in the present case, an in camera hearing may be required to determine whether the defendant's need for the information outweighs the third-party's interest in confidentiality. (Pennsylvania v. Ritchie (1987) 480 U.S. 39, 60 [state statute providing for confidentiality of investigative files concerning child abuse]; see Pen. Code, 1326, subd. (c) ["court may order an in camera hearing to determine whether or not the defense is entitled to receive the documents"].) Hammon is quite clear, however. This in camera review is to occur, if at all, at trial not during pretrial proceedings:

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