Federal Rules of Evidence – Rule 106 (through March 1, 2020)
If you introduce a writing or recorded statement, the other side can make you include any omitted parts that should in fairness be considered at the same time.
If a party introduces all or part of a writing or recorded statement, an adverse party may require the introduction, at that time, of any other part — or any other writing or recorded statement — that in fairness ought to be considered at the same time.
Selected Committee Notes
The rule is an expression of the rule of completeness. McCormick §56. It is manifested as to depositions in Rule 32(a)(4) of the Federal Rules of Civil Procedure, of which the proposed rule is substantially a restatement.
The rule is based on two considerations. The first is the misleading impression created by taking matters out of context. The second is the inadequacy of repair work when delayed to a point later in the trial. See McCormick §56; California Evidence Code §356. The rule does not in any way circumscribe the right of the adversary to develop the matter on cross-examination or as part of his own case.
For practical reasons, the rule is limited to writings and recorded statements and does not apply to conversations.