About US

Who We Are

For the past 40 years, William Difenderfer has built a reputation for unwavering legal advocacy, vigorous representation, and a commitment to protecting client rights. From obtaining ‘not guilty’ verdicts in death penalty cases to having assault cases dismissed, Bill has a history of achieving successful results, both in negotiations and at trial. He has developed a strong network of trusted relationships throughout Pennsylvania and has earned a reputation for his professionalism, integrity, and skill within the legal community and among clients.

Nationally recognized for successfully defending high-profile clients, Bill Difenderfer brings extensive litigation experience to Difenderfer Law, where he works closely with attorney Philip Quinn. Together, they provide strategic criminal defense across Pittsburgh and Western Pennsylvania, offering tailored solutions for cases ranging from summary offenses to complex felonies.

William (Bill) Difenderfer and Philip Quinn | Criminal Defense Attorneys

Featured On

in the media

Why Choose Difenderfer Law Attorneys?

Experienced Legal Counsel

We have over 40 years of combined criminal defense experience as trial litigators at both the state and federal level, including complex and high-profile cases.

Client-Centered Focus

We’re here to listen to your needs, help you understand the law and legal procedures surrounding your case, and fully explain your options and rights.

A History of Success

The attorneys at Difenderfer Law have a consistent track record of dismissals, acquittals, reduced charges, and ‘not guilty’ verdicts (even in death penalty cases).

Personalized Legal Representation

Following a thorough, comprehensive approach, each case is carefully assessed to deliver legal services and strategic solutions tailored to your unique needs.

Expertise with High-Profile Legal Matters

Difenderfer Law is experienced at navigating high-profile state and federal cases, where media attention can impact both public perception and the judicial process. With legal expertise and media know-how, we strive for the best outcome — both in court and in the public domain.

While we represent a diverse client base, many are public figures, such as executives, officials, athletes, doctors, and professionals. We prioritize protecting their privacy and reputations throughout these sensitive cases.

Criminal Charges We Handle

Regardless of the charge or situation, we believe every individual deserves a zealous defense. We provide high level representation, whether you are being investigated or have been charged with a crime. Additionally, we can also assist you in clearing your criminal record through the expungement process.

Our lawyers regularly represent clients facing felony charges, misdemeanors, and summary offenses at state, federal and local courts, including, but not limited to:

“Attorney Bill Difenderfer is the best. This is who you want defending you. He is highly respected amongst his fellow attorneys, judges, and clients. This guy knows what he’s doing. I can’t sing his praises enough.”

T.R.
Google map Pittsburgh

Areas We Serve

Our office is located in downtown Pittsburgh, but our attorneys regularly appear in courts throughout Western Pennsylvania, including the counties of Allegheny, Beaver, Butler, Fayette, Indiana, Washington, Westmoreland, and the United States District Court for the Western District of Pennsylvania.