as of 6/18/2026 3:09:20 AM

Cass Thomas Casper

Disparti Law Group, P.A.
121 West Wacker Drive Suite 2300
Chicago, Illinois 60601-1784

(312) 506-5511

cass.casper@dispartilaw.com

Date Admitted

November 04, 2010

Illinois Registration Status

Active and authorized to practice law

Malpractice Insurance

In annual registration, the attorney reported that the attorney, or the attorney’s firm, maintains malpractice insurance.

Public Record of Discipline and Pending Proceedings
Case(s) below are identified by caption and Commission case number. If there is more than one case, the cases are listed from most recent to oldest. A case may have more than one disposition or more than one component to a disposition, in which case each disposition and component is also listed separately within that case record, again in an order from most recent to oldest.

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to access any documents regarding this lawyer that are in our database. Case Research contains most disciplinary opinions of the Supreme Court and most disciplinary orders and board reports issued since 1990. If Case Research does not contain the information you are seeking, please contact the Commission's Clerk's Office for assistance. Contact information for the Clerk's office is available under Clerk's Office Services.

In re Casper, Cass Thomas, 2022PR00024
(One of multiple dispositions on this case)
Disposition Probation
Effective Date of Disposition 06/10/2023
End Date of Disposition 06/09/2025 Probationary condition(s) satisfied.
Definition of Disposition Probation reflects a determination that the lawyer has engaged in misconduct, but also a finding that the lawyer may continue to practice law pursuant to specified conditions under ARDC supervision without posing a risk to the public, profession, or courts. As a result, the lawyer may continue to practice law during the period of probation, subject to the conditions imposed by the Court. Probation may be ordered for a specified period of time or for a specified period of time and until further order of the Court. Probation may be ordered in conjunction with a suspension, which may be stayed in whole or in part. A stay defers that portion of the suspension as long as the lawyer complies with probationary conditions. If the lawyer successfully completes probation, the lawyer is not actually suspended during any portion of the stayed suspension.
In re Casper, Cass Thomas, 2022PR00024
(One of multiple dispositions on this case)
Disposition Suspension for a specified period of time and until further order of the Court. Suspension stayed in part.
Effective Date of Disposition 04/11/2023
End Date of Disposition 06/10/2023
Definition of Disposition The Supreme Court may order that, following a suspension, a further period of suspension be stayed, typically in connection with an order of probation. A stay defers the further suspension period as long as the lawyer complies with probationary conditions. If the lawyer successfully completes probation, the lawyer is not actually suspended during any portion of the stayed suspension. Under those circumstances, the stayed suspension does not affect the authority of the lawyer to practice law and the lawyer may practice law during the stayed suspension. If the Court determines that the lawyer has failed to comply with probationary conditions, the Court may vacate the stay and may require that the lawyer actually serve the full suspension.
Case Summary Mr. Casper, who was licensed in 2010, was suspended for one year and until further order of the Court, with the suspension stayed after 60 days by a two-year period of probation with conditions. While representing a group of employees in a federal civil rights lawsuit against the City of Chicago and various individual defendants, Mr. Casper called one of the defendants whom he knew to be represented by counsel and had an approximately 20-minute conversation about the case. He later falsely stated to that defendant's counsel that he made no such call, altered his cell phone records to make it appear as though he did not make the call, and sent those altered records to the defendant's attorney. He also filed the altered records, along with a sworn declaration falsely claiming that they were accurate, with the court. The suspension is effective on April 11, 2023.
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