A barrister co-defending with me in a crown court trial pulled no punches when he began his cross-examination of an expert witness with this question: “Are you going to apologise for your incompetence now or at the conclusion of your evidence?”
The 30 minutes that followed was a masterclass in how to cross-examine an expert; and a masterclass in how not to give expert evidence.
It might seem obvious that any expert should be a knowledgeable and impressive witness, but the truth is some experts are better than others.
Every barrister has a tale about how they undid an expert in cross-examination, but in too many cases the experts are not sufficiently knowledgeable.
One police drugs expert recently admit...