High Impact Litigation

GBB is a boutique law firm of attorneys with a diverse array of expertise and a strong track record of success. Our attorneys have expertise in litigation under the False Claims Act, employment, environmental, corporate governance actions, complex commercial litigation and other common law rights of action. Firm attorneys include former prosecutors, law professors, a Presidentially Appointed member of the United States Occupational Safety and Health Review Commission, former large firm defense counsel, and an attorney who is licensed to practice medicine.

GBB Attorneys have earned their reputation in high stakes litigation representing whistleblowers under the False Claims Act in cases resulting in the recovery of $6 Billion for Federal and State governments. They have litigated cases that have driven regulatory and legislative reform, including rules to protect school children against exposure to asbestos and legislation to compensate nuclear weapons workers who have contracted a dread disease. Litigation brought by firm attorneys under Federal Environmental laws caused the Secretary of Energy to cancel a massive project to recycle and distribute into commerce radioactive metal from a Tennessee Nuclear Weapons Plant.

GBB also provides employment and compliance counseling to companies and represents companies in select litigation, in their capacity as either plaintiff or defendant.
Paul J. Zwier II is one of the nation’s most distinguished professors of advocacy and skills training, providing expert advice on trial strategy, jury analysis, and negotiation and mediation.
Elizabeth Shofner is Of Counsel at Guttman, Buschner and Brooks focusing on complex civil litigation, including false claims litigation, and corporate governance matters.
Dr. Caroline Poplin, a lawyer and medical doctor, provides legal and medical advice on cases involving off-label marketing of pharmaceuticals, and Medicare/Medicaid fraud.

Dr. Caroline Poplin

Of Counsel & Medical Director

Daniel Guttman focuses his law practice has on energy, environment, antitrust, whistleblower cases brought under the Federal False Claims act and employment law.

Dan Guttman

Of Counsel

Justin S. Brooks represents relators in qui tam litigation under the federal and state False Claims Acts and corporate clients in complex commercial and employment litigation.

Justin S. Brooks

Founding Partner

Mr. Guttman has litigated complex cases involving fraud, breach of fiduciary duty, environmental derelictions, antitrust, torts or statutory violations.


Founding Partner

A former state prosecutor, Traci Buschner has spent nearly 30 years representing plaintiffs in complex litigation ranging from class actions to government contract fraud.


Founding Partner