(4) Collateral matters. The writing, recording, or photograph is not closely related to a controlling issue.
RULE 1005 PUBLIC RECORDS.
The contents of a public record, if otherwise admissible, may be proved by copy, certified as correct in accordance with rule 902 or testified to be correct by a witness who has compared it with the original. If a copy which complies with the foregoing cannot be obtained by the exercise of reasonable diligence, then other evidence of the contents may be given.