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NZ Acquitted in $1.4 Billion Health Care Fraud Case

The largest health care fraud case that DOJ has ever prosecuted

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Criminal Defense Attorneys for Any Federal Crime

Mr. Lowther and Mr. Walker understand that many clients are unfamiliar with the criminal justice system and may not know what to do or where to turn. From Health Care Fraud to Drug Offenses, we provide comprehensive defense strategies tailored to your unique case.

White Collar Crime

White-collar crimes have serious repercussions, affecting careers and personal lives; federal charges can lead to asset seizure, business harm, and require skilled legal defense due to intense scrutiny.

Health Care Fraud

Combat healthcare fraud effectively with skilled legal representation; navigate investigations and prosecutions to ensure the best outcome, leveraging expertise to protect your rights and interests.

Tax Fraud

In federal law, fraud encompasses deceptive or misleading actions resulting in financial or non-financial losses, requiring both knowledge of deception and intent to gain something for a case to be considered fraud under these statutes.

Gun & Weapons Charges

Our federal crime attorneys expertly navigate gun and weapons charges, including gun trafficking, ITAR violations, and munitions offenses. With a keen understanding of federal laws, we provide strategic defense, safeguarding your rights for the best resolution possible.

Drug Offenses

Lowther Walker, LLC offers expert legal representation for drug-related charges, providing comprehensive assistance from minor possession to trafficking allegations, ensuring proactive defense strategies and the best possible outcome.

Other Federal Charge

Federal crimes encompass a broad spectrum of offenses prosecuted at the national level, often involving serious consequences and harsh penalties; navigating these complex legal matters requires skilled representation familiar with federal law.

If you’re facing federal charges and prosecutors are closing in, call Lowther | Walker to fight back. Our defense lawyers are available 24/7 to respond to your urgent case questions.

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Regardless of your situation or location, Mr. Lowther and Mr. Walker will collaborate with you to craft a robust defense, ensuring your freedom and safeguarding your rights.

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Our Team of Federal Health Care Fraud Defense Attorneys

Aggressive legal help when you need it.

Bingzi Hu, Esq.

Joshua Sabert Lowther, Esq.

Murdoch Walker, II, Esq.

Katryna Lyn Spearman, Esq.

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Joshua Sabert Lowther, Esq.

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.

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.

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.

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

Ten Defendants Charged in $1.4 Billion Rural Hospital Pass-Through Billing Scheme

On March 21, 2023, a federal jury acquitted defendants Aaron Durall, Christian Fletcher, Neisha Zaffuto, and Aaron Alonzo of the charges alleged in the indictment described in the press release below.

Ten individuals, including hospital managers, laboratory owners, billers and recruiters, were charged in an indictment unsealed today for their participation in an elaborate pass-through billing scheme using rural hospitals in several states as billing shells to submit fraudulent claims for laboratory testing. The indictment alleges that from approximately November 2015 through February 2018, the conspirators billed private insurance companies approximately $1.4 billion for laboratory testing claims as part of this fraudulent scheme, and were paid approximately $400 million.

Jorge Perez, 60, of Miami-Dade County, Florida; Seth Guterman, 54, of Chicago, Illinois; Ricardo Perez, 57, of Miami-Dade County, Florida; Aaron Durall, 48, and Neisha Zaffuto, 44, each of Broward County, Florida; Christian Fletcher, 34, of Atlanta, Georgia; James Porter Jr., 49, of Marion County, Florida; Sean Porter, 52, of Citrus County, Florida; Aaron Alonzo, 44, and Nestor Rojas, 45, each of Miami-Dade County, Florida, were charged in an indictment filed in the Middle District of Florida....