2 Ways to Impeach a Party’s Witness
There are many ways to convince the jury that the testimony of a witness is unreliable or that the witness himself is not credible. Before impeaching a witness, the lawyer must first be knowledgeable about the State-specific rules of evidence as these rules vary widely. Some rules that apply in one state are not applicable to another. Once familiar with the rules, the next step is to find ways to undermine the evidence of the opponent validly. Today, David Serna, attorney-at-law, shares two common grounds used in impeaching a witness. 1. Federal Rule of Evidence 602: Lack of Personal Knowledge As a rule, anyone is competent to testify. However, a fact witness cannot testify on matters he or she has no personal knowledge of. Only opinion or expert witnesses can testify insofar as their opinions matter. A witness lacks personal knowledge when he or she was not present during the commission of the crime and has no way of knowing for sure h...