(Syllabus.)
Witnesses — Trial — Right to Impeach Witness Whose Adverse Testimony Has Surprised Party Calling Him — Jury to Be Informed of Limited Purpose of Impeaching Evidence. Under certain conditions, where the testimony of a witness has deceived the party calling him to the injury of such party, it would be manifestly unjust to hold the party to be bound by such deception, and to prevent him from relieving himself of such injury. But this rule is subject to certain conditions:
(a) The party must be surprised at the testimony of the witness sought to be impeached. It must be based upon such facts as would give the party reasonable grounds to believe that the witness would testify favorably to such party.
(b) The witness must have testified to facts injurious to the party calling him before he can be so impeached. The evidence is permissible only for the purpose of impeaching the witness, and is not original, substantive evidence against the adverse party.
(c) When such evidence is admitted, under proper conditions, the court should clearly inform the jury that such contradictory statements can only be considered by them for the purpose of affecting the credibility of the witness and that it is for the jury alone to determine whether they do have this effect or not, and that such contradictory statements are in no sense to be considered as original evidence against the adverse party.