Uniform Code of Military Justice
Article 34. Preservation of Evidence.
(a) A person responsible for evidence shall reasonably preserve material evidence obtained during an investigation or judicial proceeding.
(b) Records concerning material evidence shall identify, where applicable—
(i) the source;
(ii) collection;
(iii) transfer;
(iv) examination;
(v) storage; and
(vi) final disposition.
(c) Criminal alteration, fabrication, destruction, concealment, or substitution of evidence is governed by the applicable punitive Article of this Code.