His practice also involves directing internal corporate investigations and representation in qui tam litigation, complex immigration matters, antitrust cases, and criminal environmental matters. 

He maintains one of the most active and successful federal trial practices in Texas, defending allegations involving health care fraud, financial fraud, complex immigration charges, anti-kickback violations, and securities fraud. Mr. Ansley regularly represents individuals and companies in matters involving the Department of Justice (DOJ), the Securities and Exchange Commission (SEC), Immigration and Customs Enforcement (ICE), the Federal Deposit Insurance Corporation-CID (FDIC), the Federal Bureau of Investigation (FBI), the Department of Health and Human Services Office of Inspector General (HHS-OIG), the Health Care Fraud Prevention and Enforcement Action Team (HEAT) and Health Care Fraud Strike Force, the Department of Defense (DOD) and many other agencies. He routinely advises companies in connection with regulatory and criminal issues concerning their employment practices and compliance with increasingly complex immigration laws. Mr. Ansley has successfully tried numerous federal criminal cases for and against the government, including as lead trial counsel in a month-long jury trial resulting in a complete defense verdict in an alleged $500 million health care fraud and kickback scheme. 

In the health care industry, Mr. Ansley defends physicians and other health care providers, practice groups, hospitals, dentists, DSOs, pharmacists and marketers in criminal and regulatory investigations, prosecutions and trials. In the securities industry, he represents public companies, their officers and directors, broker-dealers, financial advisers and advisory firms, and other securities industry participants in investigations and proceedings by the DOJ, SEC, Financial Industry Regulatory Authority (FINRA) and state securities regulators. Mr. Ansley also has led numerous internal investigations into possible criminal and regulatory misconduct and counsels clients regarding compliance in these areas.

Before joining Vedder Price, Mr. Ansley served for almost a decade as an Assistant U.S. Attorney in the Major Fraud and Public Corruption Section of the U.S. Attorney’s Office for the Northern District of Texas. As an AUSA, he led the district’s inter-agency Fraud Task Force, where he prosecuted and tried complex health care fraud, securities fraud, bank fraud, immigration, and public corruption cases. Notably, he was lead counsel in the investigation, prosecution and eventual months-long trial of the largest Ponzi scheme in the Northern District of Texas, culminating in guilty verdicts and extensive sentences for the architects of the fraud.

Based on his combined experience as a fraud prosecutor and SEC attorney, Mr. Ansley has an insider’s knowledge of the tactics used by prosecutors and investigators, resources he now uses on behalf of his clients. This experience makes him uniquely qualified to handle not only these investigations and charges, but also any collateral regulatory, administrative and civil consequences.

Mr. Ansley is ranked by Chambers USA for “Litigation: White-Collar Crime & Government Investigations,” Texas – Band 2, where he is described as “a go-to for white-collar matters,” “very, very well versed in healthcare fraud investigations and defense” and “the consummate client-focused attorney.” He has been selected by his peers for inclusion in The Best Lawyers in America® since 2018, was named a “Litigation Star” in the Benchmark Litigation 2020 guide and has been selected by his peers for inclusion in Thompson Reuters Super Lawyers since 2010. The Legal 500 United States recommended Mr. Ansley in the Dispute resolution: Corporate Investigations and White-Collar Criminal Defense category in 2024. He is consistently recognized by Texas Monthly and D Magazine as a top practitioner and for the strength of his white collar defense practice and serves as a frequent speaker, author and commentator.