In Testimony From Experts In Demand Tyler Kekewich of the Financial Post describes expert witnesses:
You’ve seen them in movies and watched them on television. They are the superstars of a trial and their testimony can make or break a lawyer’s case. They’re expert witnesses — from coroners to accountants, engineers and scientists — and judges and juries hang on their every word. They can be the difference between acquittal or conviction or reaping a huge damage award versus being left with nothing but a big legal bill to pay.
Kekewich also shares the five traits of a successful expert witness: