Representative Matters

Daniel Purdom has extensive trial and investigative experience concerning white collar federal crimes, health care fraud, complex financial fraud, tax fraud, insurance fraud, SEC fraud, international antitrust, official and police corruption, RICO, organized crime, bank embezzlement, the False Claims Act, and bank fraud. He has tried dozens of criminal and commercial cases in numerous states, and has briefed and argued more than 25 cases to federal and state appellate courts.

In addition to his white collar criminal practice, Dan has extensive trial experience in health care fraud and abuse, Illinois Attorney Registration and Disciplinary Committee (ARDC) defense, False Claims Act/qui tam actions, commercial litigation, employment, and class action lawsuits.

He has represented numerous medical providers nationally who have been involved in federal, state, and regulatory investigations of alleged health care fraud and related problems, including False Claims Act/qui tam actions. He also handles internal investigations of employee wrongdoing involving embezzlement or internal fraud and has helped various clients implement and monitor corporate compliance programs.

In 1986, as an Assistant U.S. Attorney in the Northern District of Illinois, Dan prosecuted the largest health care fraud in the United States at that time. He secured the dismantling of a $20 million Medicaid fraud scheme and the conviction of more than 40 individuals, including doctors, pharmacists, and others associated with the scheme. He coordinated the efforts of the U.S. Postal Inspectors, the Illinois Department of Public Aid, the Illinois Department of Registration and Education, the Illinois State Police, and the Internal Revenue Service, and gained valuable working knowledge of the health care billing system. During his tenure with the U.S. Attorney’s Office he tried more than 35 jury trials and briefed and argued more than 15 appeals before the Seventh Circuit Court of Appeals.

Dan was appointed Special Inspector General by the State of Illinois Executive Ethics Commission to conduct several high-profile investigations. He has also been appointed as a Special State's Attorney on a number of occasions to conduct internal investigations and to provide professional ethics opinions.

Dan joined Hinshaw in 1986. He has previously served as Partner-in-Charge of Hinshaw's Lisle office and headed the firm's National White Collar Criminal Practice Group. Dan was also formerly a member of Hinshaw's Executive Committee.

Previously, from 1980 to 1986, he served as an Assistant United States Attorney for the Northern District of Illinois (Chicago). From 1978 to 1980, he clerked for Chief U.S. District Court Judge James L. Foreman of the Southern District of Illinois.

Dan graduated first in his law school class from Southern Illinois University School of Law in 1978. In addition, he was the recipient of the Monroe Award for Excellence in Legal Writing and Research, and the West Award for Highest Academic Honors (1st, 2nd and 3rd years). He also received numerous awards for highest grades in individual classes.

Professional Affiliations

  • American Bar Association
    • Section of Business Law
      • White Collar Crime Committee
  • DuPage County Bar Association

Honors & Awards

  • Recognized by his peers as a "Leading Lawyer" in the areas of: White Collar Criminal Defense and Commercial Litigation
  • Holds the AV® Peer Review Rating from Martindale-Hubbell, its highest rating for ethics and legal ability
  • Selected by his peers for inclusion in The Best Lawyers in America© for Criminal Defense: White Collar, 2018 – 2024
  • Recognized on the Super Lawyers list by Illinois Super Lawyers magazine, 2005 – 2024
  • Recipient of the Chief Postal Inspector's Special Award, which is presented each year to one prosecutor in the nation from the United States Department of Justice
  • Recipient of the Department of Justice's Director's Award from the United States Department of Justice
  • Recipient of the Special Commendation Award from the United States Department of Justice

Representative Matters

Dan has continued his significant record of trial success across a wide spectrum of commercial litigation and white collar criminal cases. Among his representative cases are:

  • US v. Pratt (N.D. of Illinois): Obtained dismissal on the eve of trial in multi-million dollar criminal mortgage fraud prosecution.
  • US v Newlin (N.D. of Indiana): Obtained dismissal of multi-million dollar criminal tax fraud on the eve of trial.
  • Steiner Sports Marketing, Inc. v. David Ortiz: Successfully resolved this contract dispute in the Supreme Court of the State of New York.
  • Jaime Torres Sports Management, Inc. v. Noel Arguelles, Player, Jose Iglesias, Player, and SFX Baseball Group, Agent: Successfully defended SFX Baseball Group and two Cuban teenage defectors in Major League Baseball Players Association arbitration, multiple week trial.
  • The Name LLC, a Delaware Limited Liability Company, (Jay- Z) v. David Ortiz: Successfully resolved this case in the Southern District of New York.
  • US v. Kien: A two-week jury trial ended when Dan was able to secure the client an acquittal of mortgage fraud. The client, an attorney/co-owner of a real estate development company, was the only person acquitted of mortgage fraud as all 14 co-defendants either pled guilty or were found guilty.
  • McGuire v. GTE: Client was found not guilty in this Title VI and age discrimination lawsuit.
  • Psharis v. Central DuPage Hospital: Client was found not guilty in this medical malpractice death case.
  • ServiceMaster v. Navistar: Secured a $1 million verdict for his client in this commercial contract dispute.
  • McKinney v. Coca Cola: Client was found not guilty in this product liability trial.
  • U.S. ex rel. Perales v. St. Margaret's. False Claims Act where relator was seeking $89 million. Case dismissed based on ten (10) summary judgment motions.  
  • U.S. ex rel. Fields v. Sherman Health Systems: False Claims Act case with relator seeking $17 million. Case dismissed on our motion.
  • JBS v. Village of Glen Ellyn: Secured a permanent injunction for his client in this commercial land dispute.
  • Harmon v. Streams: Client was found not guilty arising out of alleged structural building defect.
  • In re: Conarty: Secured a finding in favor of his client in this Illinois Attorney Registration and Disciplinary Commission (ARDC) trial.
  • US v. Helfand: A two-week federal court jury trial for mortgage fraud. Client was acquitted on 14 of the 15 charges.


Dan speaks extensively on issues related to health care fraud, white-collar crime, the False Claims Act, attorney discipline, corporate compliance and internal corporate investigations. He was an instructor in the area of health care fraud at the FBI Academy in Quantico, Virginia, and has also been an instructor and lecturer for the National Institute of Trial Advocacy at Northwestern and Loyola Universities, the Department of Justice Advocacy Institute, and the DuPage Bar Association Trial Advocacy Program.

His presentations include:

  • "What to do when the FBI knocks on your door and other horror stories," DCBA Healthcare Law & Practice MCLE Meeting, DCBA  Bar Center, Wheaton, Illinois, October, 25, 2017
  • "What Employers Need to Know About Whistleblower Claims," Hinshaw's Annual Labor & Employment Seminar, Hoffman Estates, Illinois, October 2016


Dan was the subject of a profile entitled "Q&A With Hinshaw’s Daniel Purdom," that appeared on December 20, 2011 on the Law360 website.

He has written numerous articles, treatises, and other works on issues in his areas of practice focus. Examples of his published works include:

Community/Civic Activities

  • Xilin Association, Former member of the Board of Directors
  • Glen Ellyn Park District, Glen Ellyn baseball, and multiple sports programs, Past Coach
  • Glenbard West High School Booster Organization, Past Board Member and Past President
  • Glenbard West Youth Center Organization, Past Board Member


J.D., with highest honors, Southern Illinois University School of Law, 1978

B.S., Illinois State University, 1974