William Ziegelmueller

Schiff Hardin LLP

William Paul Ziegelmueller is a seasoned trial lawyer who represents individual and corporate clients in federal criminal investigations, regulatory enforcement actions, civil litigation, and corporate internal investigations.

He has experience in federal district and appellate courts across the country, including first-chair trial experience in both civil and criminal cases.

He represents corporations and individuals accused of alleged wrongdoing, such as fraud, political corruption, tax evasion, extortion, bribery, foreign corrupt practices, and antitrust violations.

Bill is familiar with the technical coding and billing requirements of federal health care programs, and he frequently advises health care providers in responding to government audits and subpoenas, and, if necessary, in litigating civil or criminal charges. He also counsels providers in defending against claims brought by qui tam relators.

Bill has experience in defending clients involved in investigations and enforcement actions conducted by the SEC, IRS, CFTC, OCC, ICE, FDA, USDA, and other regulatory agencies. He has been involved in several investigations related to the EB-5 visa program, government purchasing rules, anti-dumping duties, and the marketing of pharmaceuticals.

His civil litigation has involved a range of executive employment and compensation disputes, unfair competition and corporate breach of contract cases, and insurance matters.


  • Lead trial counsel in winning a not guilty verdict on bank fraud charges for our client, who was charged in the Eastern District of Texas with defrauding lenders through real estate transactions designed to take advantage of a federal tax incentive implemented after Hurricane Katrina.
  • Represented key players in many high-profile criminal investigations, including the General Motors’ ignition switch and Takata airbag recalls, and the federal inquiry into United Airlines’ ties to the Port Authority of New York and New Jersey.
  • Represented Antoin Rezko, an advisor to former Illinois Governor Rod Blagojevich, in a three-month trial in Chicago.
  • Represented the lead defendant in the TAP Pharmaceuticals case, which culminated in the acquittal of all individual defendants after a three-month jury trial in Boston.
  • Led discovery and was second chair in the trial defense of a Blue Cross/Blue Shield of Illinois executive, which ended in an acquittal after a lengthy trial in the Southern District of Illinois.
  • Represented a former attorney who was charged with developing complex tax shelters promoted by major law firms, banks, and brokerage houses during a four-month trial in New York.
  • Led the trial defense of the owner of a California pharmacy charged with criminal health care fraud offenses.


  • Northwestern Pritzker School of Law, J.D., 1994
  • Wake Forest University, B.A., 1991


  • American Bar Association
  • Chicago Bar Association
  • Seventh Circuit Bar Association


Rate : $$$

What types of cases Attorney William Ziegelmueller & Schiff Hardin LLP can handle?
Schiff Hardin LLP can handle cases related to laws concerning Litigation, White Collar Crime, Government. We manually verify each attorney’s practice areas before approving their profiles and reviews on our website.
Where is Schiff Hardin LLP located?
Schiff Hardin LLP is located at 233 S Wacker Dr #7100, Chicago, IL 60606, USA. You can reach out to Schiff Hardin LLP using their phone line 312.258.5576. You can also check their website sc or email them at schiffhardin.com.
How much would it cost to hire Schiff Hardin LLP?
William Ziegelmueller lawyer charges are specific to each case. However, they work with contingency fees and its ranges from $$ to $$$. They also provide free consultation [and no obligation quotes] if you are interested to hire.
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Schiff Hardin LLP
233 S Wacker Dr #7100, Chicago, IL 60606, USA
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