Healthcare Fraud Lawyer

Joshua Sabert Lowther, Esq.

Partner

Joshua Sabert Lowther, Esq., is a native of coastal South Carolina. He earned a Bachelor of Arts degree in English Literature from the University of South Carolina in Columbia, South Carolina, and a Doctor of Jurisprudence degree, magna cum laude, from the John Marshall Law School in Atlanta, Georgia. While at the John Marshall Law School, Mr. Lowther ranked fifth in his graduating class, and was the recipient of the prestigious Wig and Gavel award, by nomination of the faculty, for his being the “most likely to succeed in the practice of law.”

Since his becoming an attorney, Mr. Lowther has practiced law exclusively in the area of criminal defense. He began his career defending clients in federal and state courts in the Atlanta, Georgia, metropolitan area, and he has since expanded that practice to include federal trial, appellate, administrative, and tribal courts across the United States.

While Mr. Lowther enjoys and participates in every aspect of the firm’s practice, courtroom advocacy remains his passion. He has tried federal criminal cases and argued federal criminal appeals across the United States with remarkable results.

He is a member of the following professional associations:

• Association of Federal Defense Lawyers
• National Association of Criminal Defense Lawyers
• Georgia Association of Criminal Defense Lawyers
• State Bar of Georgia
• Atlanta Bar Association
• Federal Bar Association

Murdoch Walker, II, Esq.

Partner

Murdoch Walker, II, Esq., is a native of Portland, Maine. He earned a Bachelor of Arts degree in Political Science from Union College in Schenectady, New York, and a Doctor of Jurisprudence degree, cum laude, from the Charleston School of Law in Charleston, South Carolina. While at the Charleston School of Law, Mr. Walker earned a CALI Award in Legal Research and Writing.

Since becoming an attorney, Mr. Walker has practiced law exclusively with Lowther | Walker LLC, and its predecessor firm, the National Federal Defense Group. He began his career with the New York County District Attorney’s Office in Manhattan; after sixteen months as a Trial Preparation Assistant with one of the office’s six trial bureaus, he spent almost three years as an Investigative Analyst with the Homicide Investigation Unit. Eventually, Mr. Walker relocated to the greater Hilton Head Island area of South Carolina, where he worked for approximately six years as both a narcotics investigator assigned to a state multi-jurisdictional drug task force and as a criminal investigator employed with the local prosecutor’s office’s Career Criminal Unit. For the majority of his tenure in narcotics investigation, Mr. Walker served as the area’s sole Drug Enforcement Administration (DEA) Task Force Officer, primarily investigating federal drug trafficking crimes.

Mr. Walker has coupled his vast experience in criminal investigations and prosecutions with his knowledge of federal criminal and asset-forfeiture law, and accordingly, focuses his practice on defending clients in federal trial and appellate courts nationwide.

He is a member of the following professional organizations:

• Association of Federal Defense Lawyers
• National Association of Criminal Defense Lawyers
• Georgia Association of Criminal Defense Lawyers
• State Bar of Georgia

Katryna Lyn Spearman, Esq.

Associate Attorney

Katryna Lyn Spearman, Esq., is a native to The Woodlands, Texas. She earned a Bachelor of Arts degree in Business Administration, focusing on Business Law and Ethics, from The Georgia Institute of Technology in Atlanta, Georgia, and a Doctor of Jurisprudence Degree from the John Marshall Law School in Atlanta, Georgia, where she excelled in criminal law courses.

Since becoming an attorney, Ms. Spearman has practiced law exclusively in the area of criminal defense, and now focuses her practice in the areas of federal criminal trial litigation and Government investigations throughout the United States, which has yielded extraordinary results. She particularly enjoys sentencing mitigation and working with the firm’s female clients.

She is a member of the following professional organizations:

• National Association of Criminal Defense Lawyers
• State Bar of Georgia

Bingzi Hu, Esq.

Associate Attorney

Bingzi Hu, Esq., is a native of Hunan, People’s Republic of China. She earned a Master’s Degree in Civil and Commercial Law from the Beijing Technology and Business University in Beijing, P.R. China, and a Juris Doctor degree from the Georgia State University in Atlanta, Georgia.

Since becoming an attorney, Ms. Hu has practiced law exclusively in the area of criminal defense, first with a prominent Atlanta, Georgia-based federal and state criminal-defense law firm, and now with Lowther | Walker LLC. Ms. Hu’s research and writing capabilities are unsurpassed, and she focuses her practice in the areas of pretrial motions, appellate, and post-conviction relief litigation in federal criminal cases, and related federal administrative and regulatory matters, with extraordinary results. The Times-Georgian reported that she is “one of the best white-collar crime and appellate lawyers in [Georgia].”

She is a member of the following professional organizations:

• National Association of Criminal Defense Lawyers
• State Bar of Georgia

Serguel Mawuko Akiti, Esq.

Associate Attorney

Serguel Mawuko Akiti, Esq., is a native of Delaware. He earned a Bachelor of Arts degree in Criminal Justice from the University of Delaware and a Juris Doctor degree, with Honors in Criminal Justice, from Atlanta’s John Marshall Law School. Mr. Akiti further honed his litigation skills by earning a Master of Laws (LL.M.) in Trial Advocacy from the American University Washington College of Law.

Since becoming an attorney, Mr. Akiti has practiced law exclusively in criminal defense, with a particular emphasis on federal cases.. His legal career started in Washington, D.C., where he built a strong foundation in criminal advocacy. It has since grown into a nationwide practice. Today, Mr. Akiti represents clients facing serious federal charges in courts across various jurisdictions throughout the United States.

Mr. Akiti currently serves as an Associate at Lowther | Walker LLC, where he manages federal criminal matters from the pre-indictment stage through sentencing. His practice includes complex motion litigation, trial preparation, and appellate advocacy. Notably, Mr. Akiti argued and secured a favorable decision as first chair before the United States Court of Appeals for the Seventh Circuit in United States v. Arthur Miles.

Prior to joining Lowther | Walker LLC, Mr. Akiti practiced at Price Benowitz LLP, where he represented clients in criminal matters nationwide, collaborated with attorneys across practice groups, and assisted in developing internal resources to support and train new attorneys.

While Mr. Akiti is involved in all aspects of federal criminal defense, courtroom advocacy remains at the heart of his work. He is licensed to practice in the District of Columbia and Maryland and is admitted to several federal courts nationwide. His approach to criminal defense is focused on the client, disciplined, and driven by a strong commitment to achieving the best possible outcomes for his clients.

Samuel L. Joseph, Esq.

Associate Attorney

Samuel L. Joseph, Esq., earned a Bachelor of Science degree in Criminal Justice from the University of Maryland Eastern Shore and a Doctor of Jurisprudence from the University of Baltimore School of Law.

Mr. Joseph began his legal career in private practice, where he handled civil and criminal litigation. He later served as an Assistant Public Defender in Baltimore, Maryland, and as an Assistant Territorial Public Defender in the United States Virgin Islands, where he represented clients in serious felony matters, including homicide, narcotics, and financial crimes. He was subsequently appointed Chief Territorial Public Defender for the United States Virgin Islands, serving three terms from 2013 to 2023. In that role, he was responsible for the management and direction of the agency, including oversight of litigation, personnel, policy development, and administrative operations.

He has also served in a consulting capacity on criminal matters. Since returning to private practice, he has resumed representing clients at both the state and federal level.

Mr. Joseph is admitted to practice in Georgia, Maryland, and the United States Virgin Islands, and has experience handling matters across multiple jurisdictions.

He is a member of the following professional organizations:

• American Bar Association
• National Association of Criminal Defense Lawyers
• National Legal Aid and Defender Association
• American Immigration Lawyers Association
• Corporate Legal Operations Consortium