Kenya Sibley v. Warner D. Mendenhall, Esquire, Logan Trombley, Esquire, and Mendenhall Law Group

CourtDistrict Court, N.D. Illinois
DecidedMarch 30, 2026
Docket1:24-cv-07060
StatusUnknown

This text of Kenya Sibley v. Warner D. Mendenhall, Esquire, Logan Trombley, Esquire, and Mendenhall Law Group (Kenya Sibley v. Warner D. Mendenhall, Esquire, Logan Trombley, Esquire, and Mendenhall Law Group) is published on Counsel Stack Legal Research, covering District Court, N.D. Illinois primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Kenya Sibley v. Warner D. Mendenhall, Esquire, Logan Trombley, Esquire, and Mendenhall Law Group, (N.D. Ill. 2026).

Opinion

UNITED STATES DISTRICT COURT NORTHERN DISTRICT OF ILLINOIS EASTERN DIVISION

KENYA SIBLEY,

Plaintiff, Case No. 1:24-CV-07060

v.

WARNER D. MENDENHALL, Judge John Robert Blakey Esquire, LOGAN TROMBLEY, Esquire, and MENDENHALL LAW GROUP,

Defendants.

MEMORANDUM OPINION AND ORDER Plaintiff Kenya Sibley sues Defendants Warner D. Mendenhall, Esquire, Logan Trombley, Esquire, and Mendenhall Law Group, (collectively, “Defendants”), alleging legal malpractice and breach of fiduciary duty for their negligent actions and omissions that she claims resulted in the dismissal of her claims as a relator under the False Claims Act, 31 U.S.C. § 3729 et seq., and the failed prosecution of her employment discrimination and retaliation claims. [1] at 1–2. Defendants move to dismiss Plaintiff’s claims under Federal Rule of Civil Procedure 12(b)(6) for failure to state a claim upon which relief can be granted. [16]. For the reasons explained below, this Court grants in part, and denies in part, Defendants’ motion. I. Complaint Allegations1 Plaintiff worked for Medical Business Office Corporation (“MBO”) and Trustmark Recovery Services, Inc. (“Trustmark”). [1] ¶13. These jointly owned

1 The Court takes the following facts from Plaintiff’s Complaint [1] and from the docket of the underlying case in this action, Ct. Docket, United States ex rel. Sibley v. University of Chicago companies provided medical billing and debt recovery services for medical care providers who sought reimbursement from the United States through Medicaid and Medicare programs. Id. In 2017, Plaintiff and two coworkers (collectively, “relators”),

through their first attorneys (Potter Bolanos LLC), filed the original complaint in the underlying case in this action, United States ex rel. Sibley v. University of Chicago Medicine, No. 17-cv-4457 (N.D. Ill. June 13, 2017) [hereinafter, the “Underlying Case”]. Compl., United States ex rel. Sibley v. Trustmark Recovery Servs., Inc., No. 17-cv-4457 (N.D. Ill. June 13, 2017). On January 21, 2020, the relators entered into a legal representation

agreement with Defendants to pursue their False Claims Act (“FCA”), employment retaliation, and employment discrimination claims against specified defendants. [1] ¶ 14, Ex. B. The agreement between the parties contained the following provisions: The undersigned (“Clients”) request the legal services of The Law Offices of Warner Mendenhall, Inc. (“Attorney”) and for representation to assert qui tam, whistleblower retaliation employment, and American Disabilities Act employment claims against Medical Billing Office, Inc., Trustmark Recovery Services, University of Chicago, and other defendants named in Case No. 1:17 CV 4457 at the Northern District of Illinois. . . . Clients are responsible for all expenses incurred in the prosecution of the claim including but not limited to expert fees, travel expenses, deposition costs, Court fees, and Court imposed discovery cost sharing arrangements. Clients agree to provide estimated expenses upfront as requested by Attorneys from time to time as needed. Clients give permission to Attorney to advance the payment of other costs and expenses, but Clients acknowledge they remain responsible for

Medicine, No. 17-cv-4457, (N.D. Ill. June 13, 2017), of which this Court can take judicial notice. See United States v. Wood, 925 F.2d 1580, 1582 (7th Cir. 1991); see also Ennenga v. Starns, 677 F.3d 766, 773 (7th Cir. 2012) (explaining that district courts can take judicial notice of public court documents when considering a motion to dismiss). payment of said costs and expenses and agrees to reimburse Attorney for any such costs and expense for which Attorney advances payment. Id. Ex. B at 2 (emphasis in original). On March 3, 2020, Defendants, upon behalf of the relators, filed the first amended complaint in the Underlying Case alleging violations of the FCA against MBO, Trustmark, and University of Chicago Medical Center (“UCMC”). First Am. Compl. ¶¶ 80–89, United States ex rel. Sibley v. University of Chicago Medicine, No.

17-cv-4457 (N.D. Ill. Mar. 3, 2020). The first amended complaint also contained Plaintiff’s employment discrimination and retaliation claims. Id. ¶¶ 90–94, 105–09. On September 14, 2020, the District Court in the Underlying Case dismissed relators first amended complaint without prejudice. United States ex rel. Sibley v. University of Chicago Medical Center, 486 F.Supp.3d 1210, 1225 (N.D. Ill. 2020). As to Plaintiff’s employment discrimination claim under the Americans with Disabilities Act, (“ADA”), the District Court held that the “ADA does not cover the type of leave

Sibley ultimately required.” Id. at 1224. On October 14, 2020, Defendants filed the second amended complaint upon behalf of the relators, which included, among other things, Plaintiff’s employment retaliation claim against MBO and Trustmark. Second Am. Compl. ¶¶ 98–117, United States ex rel. Sibley v. University of Chicago Medicine, No. 17-cv-4457 (N.D. Ill. Oct. 14, 2020). On August 2, 2021, the District Court dismissed the second

amended complaint with prejudice, excepting the FCA claims against MBO, Trustmark, and UCMC, which the court dismissed without prejudice as to the United States. United States ex rel. Sibley v. University of Chicago Medical Center, No. 17- cv-4457, 2021 WL 3290964, at *8 (N.D. Ill. Aug. 2, 2021), aff'd in part, rev'd in part and remanded, 44 F.4th 646 (7th Cir. 2022). On August 11, 2022, the Seventh Circuit, on appeal, reversed and remanded

the relators’ FCA claim against Defendant Trustmark and Plaintiff’s employment retaliation claim against MBO and Trustmark. United States ex rel. Sibley v. University of Chicago Medical Center, 44 F.4th 646, 665 (7th Cir. 2022). On April 7, 2025, the District Court entered Default Judgment in favor of Plaintiff upon her FCA claim against Trustmark and her employment retaliation claim against MBO and Trustmark. Judgment, United States ex rel. Sibley v.

Trustmark Recovery Servs., Inc., No. 17-cv-4457 (N.D. Ill. Apr. 7, 2025). On August 11, 2024, before the court entered default judgment, Plaintiff filed this lawsuit alleging that Defendants mishandled the Underlying Case and limited her recovery from either a judgment or settlement in her favor. [1] ¶¶ 24–26. Plaintiff claims Defendants acted negligently in the following ways: • pleading “inaccurate, incomplete, and materially false and misleading statements” in the original complaint and refusing to include in the first amended complaint “accurate and dispositive evidence” Plaintiff provided, despite her instructions, id. ¶ 23(a);

• failing to plead a false claim against certain entities and individuals despite being provided supporting evidence and being instructed to by Plaintiff, id. ¶ 23(b);

• missing the statute of limitations for Plaintiff’s employment discrimination and retaliation claims while Plaintiff had a right to sue letter from the EEOC against MBO, id. ¶ 23(c);

• unethically “engaging in an actual conflict of interest” among relators in the Underlying Case when relators’ legal positions became adverse, id. ¶ 23(d); • failing to disclose and unilaterally rejecting a $10 million settlement offer from UCMC without Plaintiff’s informed consent, id. ¶ 23(e);

Free access — add to your briefcase to read the full text and ask questions with AI

Related

Conley v. Gibson
355 U.S. 41 (Supreme Court, 1957)
Scheuer v. Rhodes
416 U.S. 232 (Supreme Court, 1974)
Bell Atlantic Corp. v. Twombly
550 U.S. 544 (Supreme Court, 2007)
Ashcroft v. Iqbal
556 U.S. 662 (Supreme Court, 2009)
United States v. Randall K. Wood
925 F.2d 1580 (Seventh Circuit, 1991)
Ennenga v. Starns
677 F.3d 766 (Seventh Circuit, 2012)
Gary McKnight v. Kenneth A. Dean
270 F.3d 513 (Seventh Circuit, 2001)
Ann Bogie v. Joan AlexandraSanger
705 F.3d 603 (Seventh Circuit, 2013)
Nelson v. Quarles and Brady, LLP
2013 IL App (1st) 123122 (Appellate Court of Illinois, 2013)
Brooks v. Ross
578 F.3d 574 (Seventh Circuit, 2009)
Biomet Inc. v. Finnegan Henderson LLP
967 A.2d 662 (District of Columbia Court of Appeals, 2009)
Ignarski v. Norbut
648 N.E.2d 285 (Appellate Court of Illinois, 1995)
Fabricare Equipment Credit Corp. v. Bell, Boyd & Lloyd
767 N.E.2d 470 (Appellate Court of Illinois, 2002)
Smiley v. Manchester Insurance & Indemnity Co.
375 N.E.2d 118 (Illinois Supreme Court, 1978)

Cite This Page — Counsel Stack

Bluebook (online)
Kenya Sibley v. Warner D. Mendenhall, Esquire, Logan Trombley, Esquire, and Mendenhall Law Group, Counsel Stack Legal Research, https://law.counselstack.com/opinion/kenya-sibley-v-warner-d-mendenhall-esquire-logan-trombley-esquire-and-ilnd-2026.