10 most common expert witness mistakes in courts
One mistake could destroy your credibility as an expert witness. Download our free guide: the 10 most common expert witness mistakes in courts, and how to avoid them.
Your professional reputation is on the line every time you enter the witness stand.
Recent Court of Appeal decisions have sent a stark warning to expert witnesses across Ireland. Experts who misunderstand their role or fail to maintain independence are now having their evidence excluded entirely – not just given less weight, but ruled inadmissible.
In one recent case, a toxicologist’s entire testimony was thrown out after the Court found he had “seriously abused his position as expert witness.” The judge stated that expert witness culture in Ireland is “unacceptable and needs to change.”
The consequences are serious:
- Evidence excluded completely.
- Professional reputation damaged.
- Potential cost implications.
- Loss of future instructions.
The good news? These mistakes are entirely avoidable with proper knowledge and training.
What you will learn in this free guide
This practical guide, based on recent Irish case law and Court of Appeal decisions, reveals:
- The #1 mistake that leads to evidence being excluded (and why so many experts still make it).
- How to maintain objectivity and independence – even under hostile cross-examination.
- The “red flags” in expert reports that immediately undermine your credibility.
- What Order 39, Rule 57(1) of the Superior Courts Rules really means for your duties.
- Real examples from Irish courts showing what went wrong – and how to get it right.
- Practical steps to protect your reputation and ensure your evidence is admissible.
Who should download this guide?
This guide is essential reading for:
- Healthcare professionals who provide expert testimony.
- Engineers and technical experts.
- Accident investigators.
- Financial and forensic experts.
- Anyone who has given or may give expert evidence in Irish courts.
Whether you’re an experienced expert witness or considering your first case, this guide will help you understand your duties and avoid career-damaging errors.
About La Touche Training
For over 30 years, La Touche Training has been Ireland’s leading provider of legal training for professionals who give evidence in court.
Our Expert Witness Programme has trained thousands of professionals across healthcare, engineering, finance, and investigation sectors. We’re trusted by regulatory bodies, government departments, and private sector organisations across Ireland.
All our training is delivered by qualified barristers and solicitors who are also trained trainers.
Our credentials:
- Rated 4.9/5 by 1,265+ professionals on CourseCheck.
- Accredited by Engineers Ireland and the CPD Group.
- Over 30 years of experience training expert witnesses
