What is an Expert Witness?

An Expert Witness is “one who is skilled in some art, science, trade, profession, or other human activity, and possesses peculiar knowledge concerning it.” (Black’s Law Dictionary 688. 4th Ed. Rev. 1968). Expert witnesses are able to testify in trial about things relating to their own specialized knowledge in a particular field.

Unlike other witnesses in a trial, expert witnesses are able to testify as to their own knowledge outside of a case, whether than simply what they have heard or seen. For instance, a neurologist could be called into court to testify to a defendant’s brain injury. Expert witnesses are paid for their time in court as well, and can sometimes deliver their own conclusions based on their expertise. Other witnesses are not paid and can not provide opinions.

The current guidelines for expert witnesses were laid out in the case of Daubert v. Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579 (1993). Expert witnesses must have utilized techniques or theories prior to trial that are well tested and accepted within the scientific community, and they must be reliable for an expert to give their conclusions. In concept, expert witnesses are able to give reliable and impactful testimony in a way that non-experts can not. There are also non-testifying expert witnesses who simply offer consultation and support prior to trial.

More information about Expert Witness

Philadelphia Fatal Truck Accident Lawyer

Munley Law’s Philadelphia fatal truck accident lawyers have been fighting for families after devastating losses for almost seven decades. Our firm has secured landmark verdicts and settlements in truck accident cases, involving multi-million-dollar recoveries in wrongful death cases involving commercial trucks.

When a fatal crash changes everything, you need answers, accountability, and financial stability. We step in to protect your rights and pursue the full compensation your family deserves.

Our Philadelphia attorneys are nationally recognized and include leaders in truck accident litigation. Munley Law is the only firm in Pennsylvania with three board-certified Truck Accident Law attorneys: Marion Munley, Daniel Munley, and Katie Nealon. We handle complex claims involving trucking companies, insurers, and corporate defendants.

From investigation to resolution, Munley Law’s Philadelphia truck accident lawyers stand with you every step of the way so you can focus on your family while we focus on justice. […]

Philadelphia Construction Accident Lawyer

With construction being one of the top 10 most dangerous jobs in the US, sustaining a potentially life-changing injury is a reality – and if this happens, you need Munley Law’s Philadelphia construction accident lawyer on your side. With almost 70 years of experience, our firm knows how to protect the rights of injured construction workers and to fight to ensure they’re fairly compensated for their losses.

Our lawyers have recovered more than $1 billion in damages thanks to our dedication to justice, thorough investigations, and strong cases. Recognizing our skills at the negotiating table and in the courtroom, numerous legal organizations and publications, such as Best Law Firms, Best Lawyers, Super Lawyers, Irish Legal 100, Martindale-Hubbell, and Lawdragon, have honored us with prestigious accolades and awards. In addition, we’ve received many five-star Google Reviews from satisfied clients.

If you or a loved one has been injured on a construction site, […]

York Uber Accident Lawyer

Services like Uber are convenient, but these vehicles are exposed to all the same risks as any other car on the road. In 2023, Pennsylvania reported over 1,200 rideshare-related accidents, with York County accounting for approximately 8% of these incidents. These accidents often involve complicated insurance policies, multiple liable parties, and strict reporting deadlines that can impact your ability to recover damages.

A York Uber accident lawyer at Munley Law can help protect your legal rights after a rideshare accident in Pennsylvania. With 65 years of experience representing car accident victims throughout York County, our legal team understands the complex nature of Uber accident claims and the challenges you may face when seeking financial compensation from your carrier.

Our Uber Accident Lawyer Track Record

Our firm is well-versed in car accident cases with a track record of securing multi-million dollar settlements for victims, […]

Personal Injury Glossary Terms

This glossary provides a quick-access resource for looking up definitions of terms you will likely encounter while seeking compensation.

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W

A

Accident Report — A detailed official record of an incident created on-site by an authority figure such as a police officer or hospital staff member.

Act of God — An unforeseen event caused by natural forces without human involvement that couldn’t have been prevented with reasonable care, […]

Williamsport Product Liability Lawyer

Understanding product liability law in Williamsport can be complex, yet important if you’ve been injured due to defective goods. It’s important to speak with an experienced Williamsport product liability lawyer to help you navigate its complexities successfully and protect victims’ rights under Pennsylvania product liability law.

If you were injured by a defective or dangerous product in Williamsport, contact Munley Law Personal Injury Attorneys for a free consultation.

What Is Product Liability Litigation?

A product liability lawsuit occurs when someone has been injured due to a flawed product and sues anyone involved with its distribution chain, including manufacturers, distributors, and retailers – in an effort to hold these entities responsible for creating something dangerous for sale in the marketplace. The goal is for all those involved (manufacturers, distributors, or retailers) responsible for having released it that caused harm – […]

Lower Merion Wrongful Death Lawyer

In the picturesque setting of Lower Merion, coupled with the vibrant and historic backdrop of Philadelphia, the importance of local representation in sensitive matters like wrongful death is magnified. Lower Merion is nestled amidst landmarks like the historic Ardmore Library and the picturesque Cynwyd Heritage Trail, where the complexities of navigating a wrongful death case demand local expertise. Situated a stone’s throw from Philadelphia, Lower Merion uniquely benefits from both its tranquil suburban charm and proximity to urban resources. Law firms like Munley Law’s Lower Merion personal injury team, offer an unparalleled blend of local insight and broader legal insight. Their deep understanding of the region ensures affected families receive justice with a touch of compassion, bridging both the Merion community and the larger Philadelphia metropolitan area. Choosing Munley Law as your wrongful death lawyer ensures expert representation and compassionate guidance, all beginning with a no-obligation, free consultation. […]

Truck Accidents and Expert Witnesses

Expert Witnesses in Truck Accident Cases: FAQ

When you have a personal injury case involving a commercial truck, the stakes are high. Truck accident cases depend on highly specialized information including industry regulations, truck mechanics, and the long-term medical and economic impacts of your crash. To build a winning case, you will need the testimony of reliable witnesses, so it is essential that you have a lawyer who can bring in the right witnesses.

Who May Testify in Court As a Witness?

Not everyone has the right to come to court and testify in a truck accident case. In order to take the stand and answer questions before a jury during a live court proceeding, a person must qualify to give testimony as a fact witness or an expert witness.

As their name suggests, fact witnesses may testify about events that they observed firsthand. […]