Illinois Supreme Court Holds That Ethical Rule Prohibiting Communication With a Represented Party Is Limited to the Same Matter, Regardless of Whether the Matters Are Factually Related
Lawyers for the Profession® Alert
Lawyers for the Profession® Alert | 2 min read
May 6, 2010
People v. Santiago, ___N.E.2___,2010 WL 966493 (Ill. 2010)
Brief Summary
The Illinois Supreme Court held that Rule of Professional Conduct (RPC) 4.2 (prohibiting communication with a represented party) is matter specific. Where defendant was a party to substantially related civil and criminal proceedings, but she was only represented in the civil proceeding, the court held that criminal prosecutors could communicate directly with defendant without the consent of her civil attorney.
Complete Summary
The Cook County child protection division sought temporary custody of defendant’s child based on suspected child abuse. Defendant was appointed counsel in this civil proceeding. The state ultimately brought criminal charges against defendant based on the same underlying incident. During the criminal investigation, and before indictment, state prosecutors interviewed defendant with a Miranda waiver, but without the consent of her counsel from the child protection proceeding, and without intent to use any evidence in the child protection proceeding. In the criminal case, defendant sought to suppress the evidence from these interviews because the prosecutors allegedly violated Illinois RPC 4.2, which states:
During the course of representing a client a lawyer shall not communicate . . . on the subject of representation with a party the lawyer knows to be represented by another lawyer in that matter unless the first lawyer has obtained the prior consent of the lawyer representing such other party . . .
134 Ill. 2d R. 4.2.
The Illinois Supreme Court held that the prosecutors did not violate RPC 4.2 because defendant was not represented in the criminal matter. The court emphasized that the rule only prohibits communication with “a party the lawyer knows to be represented by another lawyer in that matter . . . ” Defendant conceded that although she was represented in the child protection matter, she was not represented in the related criminal matter.
The court noted that the result was consistent with rulings in other jurisdictions, and that the drafters of the RPCs clearly knew how make Rule 4.2 broader, had they so intended. For example, had RPC 4.2 been intended to apply to all matters arising out of a specific set of facts — as defendant argued — the drafters could have used the phrase “same or substantially related matter” which is contained in the conflict of interest rules.
Finally, because the court found no violation of RPC 4.2, it did not reach the issue of whether suppression of evidence would be an appropriate remedy for violations of the rule.
Significance of Opinion
Under this opinion, a party alleging an RPC 4.2 violation must establish that the scope of his or her legal representation encompassed the specific matter in which the violation allegedly occurred. Thus, Rule 4.2 considerations may play a role in defining the scope of representation in the context of related or parallel proceedings, including, for example, class action or other litigation when there are related government enforcement or criminal proceedings.
This alert has been prepared by Hinshaw & Culbertson LLP to provide information on recent legal developments of interest to our readers. It is not intended to provide legal advice for a specific situation or to create an attorney-client relationship.
Related Capabilities
Featured Insights

Employment Law Observer
Aug 10, 2026
As Leaves Fall, Leave Requests Rise: Are You Compliant With Chicago’s Expanded Rules?

Press Release
Aug 7, 2026
Daniel McGrath Re-Elected Senior Director of the Federation of Defense & Corporate Counsel

Insights for Insurers Alert
Aug 7, 2026
California Supreme Court Clarifies Pleading Standards for Excess Policy Claims

Press Release
Aug 6, 2026
Charles Townsend Named a Best Mentor Finalist in the 2026 ALM Texas Legal Awards

Webinar
Aug 5, 2026
April Toy Moderates HNBA Webinar on AI in the Practice of Law

Privacy, Cyber & AI Decoded Alert
Aug 5, 2026
2026 AI Compliance: Upcoming Laws Every Organization Needs to Know

Press Release
July 21, 2026 | Updated on August 4, 2026
Three Hinshaw Attorneys Named to the 2026 National Black Lawyers’ Top 40 Under 40 List

Healthcare Alert
Aug 3, 2026
Fixing the Emergency Refill Trap: What California’s AB 1587 Means for Pharmacies

Consumer Crossroads: Where Financial Services and Litigation Intersect
Jul 30, 2026
Should Text Messages be Considered “Calls” Under the TCPA? The Seventh Circuit Says No

Healthcare Alert
Jul 30, 2026
California Courts Sharply Curtail the MICRA Damages Cap in Nursing Home Litigation

Insights for Insurers Alert
Jul 30, 2026
Analyzing a Couple of Cases Involving Exclusions in D&O Policies

