Prior Statements and How They Are Used

Prior statements are the workhorse of contested testimony. A witness who said something different last year is vulnerable, and the vulnerability comes in two forms that are frequently confused: the statement may damage their credibility, or it may itself prove something, and the second is much harder to achieve than the first.

The two uses

Impeachment. The statement is used to show that the witness has said inconsistent things, which bears on whether their evidence should be believed. It proves nothing about the underlying facts.

Substantive evidence. The statement is used to establish the truth of what it asserts, which requires an exception to the rule against hearsay and is available in a narrower range of circumstances.

The distinction has real consequences. A party who wins an argument about admissibility for impeachment and then argues the contents as fact has overreached, and the point is usually taken.

Limiting instructions exist. Where a statement is admitted for one purpose only, a decision-maker is directed to use it for that purpose alone, and the direction is taken seriously.

Ask which use is intended. Before the argument about admissibility begins, because the foundation required differs entirely between the two and half the disputes in this area are between parties answering different questions.

Impeachment in practice

The statement is put to the witness. In most systems the witness is given an opportunity to explain or deny it, and in many the extrinsic evidence is inadmissible unless that opportunity was given.

Any inconsistent statement will do. Written, oral, sworn or informal. What matters is that the same person said something materially different, not the form in which they said it.

Materiality is required. A difference about something peripheral is not impeachment; it is the kind of ordinary variation discussed in why consistency is not truth.

The witness may adopt it. A witness who accepts that the earlier version was correct has effectively given that evidence, which is frequently what the questioner actually wanted.

Or explain it. A plausible explanation ends the line of questioning, and pressing on afterward damages the questioner rather than the witness. That is why the technique is used sparingly by people who understand it.

When a prior statement is substantive

Given under oath in a proceeding. Deposition or hearing testimony by the same witness is generally admissible for its truth where it is inconsistent with what they now say.

A statement of identification. An earlier identification of a person is treated as substantive in most systems, on the reasoning that the earlier identification is the more reliable one.

A prior consistent statement, in narrow circumstances. Admissible to rebut a charge of recent fabrication or improper influence, and generally only where it was made before the motive to fabricate arose.

A party's own statement. What a party said out of court is generally admissible against them without any exception being needed, which is covered in admissions against interest.

A recorded recollection. Where a witness once knew something and made a record of it while it was fresh, the record may be read even though they no longer remember, which connects to proving that a record once existed.

The foundation, and how it is laid

Identify the statement. When it was made, to whom, in what circumstances, and in what form. A statement nobody can place is a statement nobody has to answer.

Establish that it is the witness's. Signature, recording, or the evidence of somebody present, because a witness who denies making the statement raises a separate question entirely.

Put the substance, not a paraphrase. Quoting what was said avoids an argument about whether the summary was fair, and the argument is one the questioner tends to lose.

Allow the explanation. Both because most systems require it and because an unexplained inconsistency put fairly is more damaging than one the witness was never allowed to address.

Then produce the extrinsic evidence. The document, the transcript or the witness to the earlier statement, if the witness does not accept it.

Prior consistent statements, and their limits

They are not generally admissible. A witness cannot be bolstered simply by showing that they have told the same story before, because repetition adds nothing whatever to reliability and a false account can be repeated indefinitely.

The recent fabrication exception. Where it is suggested that the account was invented recently, an earlier statement made before the alleged motive arose meets the suggestion directly.

Timing is the whole point. A consistent statement made after the motive to fabricate arose proves only that the account is old, not that it is true.

They may rebut improper influence. Where it is suggested that the witness was coached, a statement predating the alleged coaching answers the point.

Do not lead with them. Producing consistent statements before anybody has attacked the account signals anxiety and invites the attack that had not been made.

The distinction between impeaching a witness and proving a fact is the whole of this subject, and it is the thing most often lost in argument. A statement that shows a witness has been inconsistent has damaged them and established nothing.

That matters most at the end, when submissions are written. A party who has attacked a witness successfully but has no evidence of the underlying facts is in a weaker position than they feel, because discrediting an account does not establish the opposite of it.

The exceptions permitting substantive use are worth knowing precisely, because they are narrow and they are the difference between an argument and a finding. Testimony given under oath in an earlier proceeding is the most useful of them by a wide margin.

Prior consistent statements repay careful handling. Deployed in answer to a specific suggestion of recent invention they are effective; deployed pre-emptively they are inadmissible and they advertise a concern nobody had raised.

Finally, the requirement to put the statement to the witness is not a formality. It is what makes the technique fair, and it frequently produces the most useful outcome available, which is a witness who accepts that the earlier version was right.