Colleagues,
I think it would be helpful for anyone who already has a list of questions for the prosecution (to establish the Diver as an expert) to post them. These "Voire Dire" questions are very helpful to have ahead of time. I'd like to see, for my purposes, the questions either listed here or sent privately to me. I know it would be helpful for me to review them and add meaningful questions to our list.
I am the Trainer for the Utah Dept of Public Safety Dive Team. We have now aided in the investigation of several homicides but none have begun litigation as yet. Thanks.
Sgt. Wendell Nope
Utah DPS Dive Team
801-209-5790 cell
wnope@utah.gov email
Wendell Nope Police Diving Web Pages
Wendell,
Prosecutors, like all trial lawyers, are generally a prickly lot, and have their own ways of doing things in court. Any experienced prosecutor has qualified many witnesses as experts, using her own pet questions, and she may not welcome advice from you on how to do that. However, most prosecutors will probably be grateful to get some help from you about what exactly a PSD is, what training and experience you have had, classes you have attended, certifications you have received, dives done, training sessions performed, and scenes or incidents investigated. You should also let the prosecutor know about your standards and protocols that you adhere to, and what records you have of what was done at the incident in question. If there is any equipment involved, explain it to the prosecutor. She may know all about radar guns and breathalyzers, but have no idea what a side scan sonar is or how it works or what it can and can't do.
Bear in mind that most of the time you appear in court as a PSD, you are actually a kind of hybrid witness - you are both an expert and a fact witness. You are an expert in PSD by virtue of your training and experience in an area outside the knowledge of the average person. That is essentially the definition of an expert for court purposes. But you are also a fact witness - you are going to tell the jury about important facts in the case that you have personal knowledge of due to your observations and actions at the scene of wherever it was you responded to.
Experts are allowed to give opinion testimony, plain old fact witnesses are not (beyond common everyday subjects). So the prosecutor will want to establish that you are an expert in some particular area before asking you to give an opinion about it. Before the prosecutor asks you, for example, how long the body was in the water, or if the engine was running when the car went into the river, first you are going to have to establish that you are qualified to give such evidence. But even if you are not qualified or are not asked to give opinions, you will certainly be asked about what you saw and did when you fished the body out of the water or discovered the car in the river under the bridge.
Here are some foundational elements related to expert testimony:
Qualifications
- The witness has specialized training in the field of his expertise.
- The witness has acquired advanced degrees or certificates from educational/training institutions.
- The witness is licensed or certified in a particular field.
- The witness has practiced in the field for a substantial period of time.
- The witness taught courses in the particular field.
- The witness has published books or articles in the particular field.
- The witness belongs to professional organizations in a particular field.
- The witness is or has been an officer or director of professional organizations in a particular field.
- The witness has previously testified and been qualified as an expert before a court or administrative tribunal on the particular subject to which he is asked to render an opinion.
Basis for Opinion
- The expert's testimony is based on sufficient facts or data.
- The testimony is the product of reliable principles and methods.
- The witness has applied the principles and methods reliably to the facts of the case.
Foundation for Opinions
If the expert is testifying to something he perceived prior to the hearing, at the hearing or from something to which he has firsthand knowledge, the foundation requirements are:
- the witness observed the fact or event,
- when the witness observed the fact or event,
- where the witness observed the fact or event,
- what persons were present,
- how the witness observed the fact or event,
- a description by the witness of the facts observed,
- an opinion rendered from those facts.
The Statement of the Expert's Opinion
- the expert states that he has an opinion.
- the expert states that the opinion is based on a "reasonable certainty" or "reasonable probability" within his specialized field,
- The witness states his opinion.
Explanation of the Expert's Opinion
- the expert explains the opinion.
- the expert explains the significance of each basis for the opinion.
- the expert demonstrates how each basis contributes to the opinion and/or supports his opinion.
If you testify as an expert, you can expect to be challenged as to any or all of these points by the opposing attorney. Your qualifications as an expert may be challenged in the middle of your direct examination with voir dire questions, before you are permitted to give your opinion (e.g. Marissa Tomei being questioned by the prosecutor in
My Cousin Vinny as to her knowledge of auto mechanics). During cross examination, after your direct testimony is over, everything about your opinion is open to question (e.g. Joe Pesci's questions to the FBI tire expert in the same movie).