Law enforcement expert witness, attorney, and former police chief Andy Hall writes:
An Expert Witness is someone who the court recognizes as an authority on a specific topic. In order to be accepted as an expert witness, the court will require the expert to present his/her qualifications under oath so that the judge and jury can determine how much weight should be placed on the expert’s testimony.
Because each side will normally present their own expert witnesses, this is where the term “Battle of the Experts” comes from. The most credible witness is usually the one who is:
1. -The most credentialed 2. -The most knowledgeable on the subject 3. -The most familiar with the material 4. -The most articulate and persuasive 5. -The most direct and candid