Sixth Circuit Clarifies Admissibility of Patient-Death Evidence in Pill-Mill Prosecutions and Limits Reliance on Post-Conspiracy Regulatory Repeals

I. Introduction

United States v. Grenkoski (a consolidated appeal with co-defendants Evann Herrell and Keri McFarlane) arose from a 30-day jury trial in the Eastern District of Kentucky involving Express Health Care (“EHC”), an ostensible addiction-treatment provider that the government characterized—and the jury found—as a “pill mill.”

The defendants were physicians at EHC and were convicted of multiple conspiracies, including conspiracy to unlawfully distribute controlled substances, health care fraud, and money laundering. On appeal, they mounted wide-ranging challenges to (i) sufficiency of the evidence, (ii) evidentiary rulings, (iii) severance, (iv) mens rea-related jury instructions post-Ruan, (v) cumulative error, and (vi) a post-sentencing attempt to correct or reduce Grenkoski’s sentence under Rule 35.

The Sixth Circuit affirmed across the board, emphasizing that most claims lacked merit and that any errors were harmless. Of particular precedential significance in a published opinion, the court expressly endorsed (in published form) the principle that evidence of patient deaths/overdoses can be admissible to prove a prescriber’s knowledge or “wanton disregard” if the government establishes a meaningful connection (“connectivity”) between the death evidence and the defendants whose mens rea is in issue.

II. Summary of the Opinion

  • Sufficiency: The court held the evidence supported convictions for conspiracy to distribute controlled substances, and for Grenkoski, conspiracy to commit health care fraud.
  • Evidentiary rulings: Most were affirmed under Rules 401/403/701/801. The court found at most minor errors (notably, an unconnected mention of two patient deaths), but deemed them harmless.
  • Severance: The court affirmed denial of McFarlane’s severance motions due to lack of “compelling, specific, and actual prejudice.”
  • Jury instructions: The court upheld instructions implementing United States v. Ruan’s subjective-knowledge requirement and upheld the deliberate-ignorance instruction consistent with circuit precedent.
  • Cumulative error: Rejected because any errors were isolated and non-prejudicial in the context of a lengthy trial and strong evidence.
  • Rule 35: The court held the district court lacked jurisdiction to correct the sentence after the 14-day window, relying on United States v. Hall.

III. Analysis

A. Precedents Cited (and How They Shaped the Decision)

1. Standards of Review and Deference to the Jury

  • United States v. Reynolds: Supplied the lens for viewing facts “in the light most favorable to the jury’s verdict.”
  • United States v. Elliott and United States v. Martinez (558 F.3d): Provided the sufficiency framework (“any rational trier of fact”) and reinforced that appellate courts do not reweigh competing evidence.
  • United States v. Persaud: Used to reject the notion that a verdict becomes irrational merely because jurors credited one expert over another.

2. Controlled-Substance Prescribing Post-Ruan

  • United States v. Ruan: The doctrinal anchor for physician prosecutions under 21 U.S.C. § 841(a)(1), requiring proof that doctors subjectively knew prescriptions were unauthorized. The panel treated Ruan as controlling both for sufficiency (circumstantial evidence of subjective awareness) and for jury-instruction accuracy.
  • United States v. Bauer: Provided Sixth Circuit post-Ruan guidance on how subjective knowledge may be proven circumstantially (e.g., ignoring red flags, failing to examine, continuing dangerous practices).
  • United States v. Anderson: Cited for pill-mill indicia and for the permissibility of “medically unnecessary” evidence in fraud-like theories.
  • United States v. Suetholz, Oppong v. United States, and United States v. Stanton: Reinforced the circuit’s consistent practice of affirming pill-mill convictions where evidence shows abnormal prescribing, minimal patient interaction, and disregard of diversion indicators; United States v. Stanton also supported deliberate-avoidance theories in conspiracy cases.

3. Health Care Fraud Through Omissions and Medical Necessity

  • United States v. Bertram: Supported the rule that health care fraud can be established by knowingly omitting material facts to obtain reimbursement (here, duplicative testing and standing orders).
  • Scott v. First S. Nat'l Bank: Used to hold Grenkoski forfeited an argument by failing to raise it in his opening brief (standing-order theory).

4. Evidentiary Rules: Relevance, Prejudice, Lay Opinion, Hearsay

  • Biegas v. Quickway Carriers, Inc.: Framed abuse-of-discretion review for evidentiary rulings, with de novo review for legal questions.
  • United States v. Young: Provided the harmless-error test for non-constitutional evidentiary errors (“did not materially affect the verdict”).
  • United States v. Wilder and United States v. Potter: Emphasized Rule 401’s “low bar” for relevance—important when the panel assumed relevance but affirmed exclusion under Rule 403.
  • United States v. Campbell: Supported exclusion of later-issued materials due to “timeline mismatch,” applied here to the post-conspiracy elimination of the X-waiver.
  • United States v. Blackwell: Used to reject the “complete defense” claim where standard evidence rules were correctly applied and excluded evidence would not create reasonable doubt.
  • United States v. Kerley (quoting United States v. Cuti): Supported allowing a witness to testify as a lay witness about whether he would have acted differently if circumstances were different.
  • United States v. Churn and Gover v. Perry: Grounded the “effect on the listener” doctrine—key to admitting statements about diversion and why witnesses acted.
  • United States v. Clay (quoting United States v. Sanders): Provided the Rule 403 standard that prejudice must be more than simply “paint[ing] the defendant in a bad light.”
  • United States v. Wells and United States v. Betro: Informed the boundary between permissible lay testimony by physicians and expert testimony; the panel assumed arguendo a boundary crossing but found harmlessness.
  • United States v. Sherrill: Supported the rule that unraised issues (e.g., failure to give a limiting instruction) are not properly before the court.
  • United States v. Bell: Provided the harmless-error measure: strong independent evidence makes evidentiary missteps non-prejudicial.

5. Patient Death Evidence (“Connectivity”)—From Persuasion to Published Endorsement

  • United States v. Hofstetter, United States v. Schwartz, and United States v. Bourlier: Cited as persuasive authority allowing death/overdose evidence when connected to the defendant’s knowledge and continued prescribing.
  • United States v. Suetholz: Previously (unpublished) reasoned that failure to adjust prescribing after learning of an overdose can show “wanton disregard” and knowledge of misuse. Here, the panel stated: “We affirm that reasoning today,” effectively elevating that rationale into published Sixth Circuit guidance.

6. Severance in Joint Trials

  • United States v. Carnes and United States v. Medlock: Set the demanding standard for severance—“compelling, specific, and actual prejudice.”
  • United States v. Tocco: Reinforced the presumption favoring joint trials, even lengthy ones.
  • United States v. Ledbetter: Rejected “generalized concerns” about spillover evidence as insufficient.
  • United States v. Sivils (quoting United States v. Zalman): Held that “inflammatory evidence” against one defendant does not alone prove substantial prejudice in a joint trial.
  • United States v. Fields: Addressed renewal/forfeiture questions; the panel avoided deciding forfeiture by affirming under either standard.
  • United States v. Fischl: Used to reject the notion that absence of a mixed verdict proves juror confusion.

7. Jury Instructions and Deliberate Ignorance

  • United States v. Blanchard: Provided the de novo standard for legal accuracy of jury instructions.
  • United States v. Iwas: Supported the sufficiency of instructions requiring proof of knowingly distributing an “unauthorized” prescription.
  • United States v. Mitchell (quoting United States v. Severson): Explained deliberate ignorance as a method of proving knowledge, not a reduction of the mens rea burden.
  • United States v. Bauer, United States v. Stanton, United States v. Anderson, and United States v. Campbell: Cited to foreclose challenges to the deliberate-ignorance instruction language the circuit has repeatedly approved.

8. Cumulative Error and Sentencing Jurisdiction

  • United States v. Warman and United States v. Underwood: Set the high bar for cumulative error—combined harmless errors must render the trial fundamentally unfair.
  • United States v. Hall: Controlled the Rule 35 jurisdictional holding: the district court must act within 14 days; filing within 14 days does not preserve jurisdiction beyond that period.

B. Legal Reasoning

1. Pill-Mill Proof and Subjective Knowledge Under Ruan

The court treated EHC’s modus operandi as classic pill-mill evidence: minimal visit times, failure to obtain records, prescriptions despite negative tests or intoxication, routine “three three three” dosing, pre-signed prescription stacks, and falsified documentation. Under United States v. Ruan, the decisive point was not merely that these practices fell below professional norms, but that the defendants knew they were acting without authorization.

The panel reasoned that subjective knowledge can be proven by circumstantial evidence and “red flag” disregard (as in United States v. Bauer and United States v. Anderson), including evidence of diversion awareness and continued prescribing. For conspiracy, the panel further relied on United States v. Stanton to emphasize that liability does not depend on completing a substantive predicate act; awareness and deliberate avoidance of illicit clinic practices can suffice.

2. Health Care Fraud: Duplicative Testing, Standing Orders, and Material Omissions

The health care fraud conspiracy was supported through evidence that EHC ordered duplicative urine testing and relied on non-individualized “standing orders.” Under United States v. Bertram, knowingly omitting material facts to obtain reimbursement can satisfy fraud elements. The panel also enforced appellate waiver discipline: under Scott v. First S. Nat'l Bank, failing to challenge an alternative theory (standing orders) forfeited that attack.

3. Evidence of Post-Conspiracy Regulatory Change: Relevance vs. Confusion

Herrell and McFarlane sought to introduce the DEA’s 2023 elimination of the X-waiver patient caps to suggest the earlier limits were misguided, and thus their conduct was less blameworthy. The panel assumed arguendo relevance under Rule 401’s “low bar,” but upheld exclusion under Rule 403 because of likely jury confusion and weak probative value given the “timeline mismatch,” explicitly analogizing to United States v. Campbell. The court emphasized the key question was the defendants’ conduct and intent during the conspiracy period—not subsequent regulatory policy shifts.

4. Hearsay and “Effect on Listener” in Pill-Mill Narratives

The court’s hearsay analysis operationalized a recurring pill-mill evidentiary pattern: statements about diversion or illegality are often admitted not to prove the statements’ truth, but to show what clinic staff and prescribers were put on notice of, and how they reacted. Relying on United States v. Churn and Gover v. Perry, the panel treated such statements as non-hearsay when used to explain witness actions (e.g., leaving the clinic, reporting diversion) and to show defendants’ exposure to red flags.

5. Physician Testimony at the Lay/Expert Boundary

The panel recognized limits under Rule 701 (as clarified in United States v. Betro) but applied a pragmatic harmless-error analysis. Even if Dr. Zotos’s testimony drifted into expert territory, the record already contained multiple experts and extensive evidence about standard practice. The court thus treated any boundary crossing as non-prejudicial under United States v. Bell.

6. Patient Death Evidence and the “Connectivity” Requirement (Key Published Clarification)

The opinion’s most notable doctrinal clarification concerns overdose/death evidence. The district court allowed death evidence only where the government showed “connectivity” to the defendants. The Sixth Circuit:

  • Approved the principle: Echoing United States v. Hofstetter, United States v. Schwartz, United States v. Bourlier, and its own unpublished United States v. Suetholz, the panel endorsed the logic that learning of an overdose/death and failing to adjust can be probative of knowledge and “wanton disregard.”
  • Policed the limitation: It found error where a witness blurted out two deaths with no subsequent linkage to defendants and no limiting instruction—because the district court’s own “connectivity” gatekeeping was not honored.
  • But found harmlessness: The remark was fleeting, cumulative of other death evidence later admitted (unchallenged on appeal), and the overall case against Grenkoski was strong.

In practical terms, the court signaled that death evidence is not per se inadmissible in pill-mill cases; the admissibility hinge is whether the government can connect the death to the defendant’s knowledge and subsequent prescribing decisions (and whether the probative value justifies the Rule 403 balance).

7. Severance and Spillover: The Sixth Circuit’s High Threshold Reaffirmed

Applying United States v. Medlock and United States v. Ledbetter, the panel treated McFarlane’s spillover fears as largely “generalized concerns.” The court emphasized the normal reality of joint trials (some evidence applies to only one defendant) and relied on the presumption that jurors follow limiting instructions and individualize evidence, consistent with United States v. Sivils and United States v. Martinez (428 F.2d).

8. Mens Rea Instructions: Implementing Ruan Without Rewriting the Trial

The court upheld the controlled-substances conspiracy instruction because it required the jury to find beyond a reasonable doubt that each defendant knew the prescriptions were not for a legitimate medical purpose in the usual course of practice—mirroring United States v. Ruan. It also rejected the defense request to distinguish malpractice from unauthorized prescribing, agreeing such an add-on risked confusion where the instruction already captured the governing legal standard.

On deliberate ignorance, the panel relied on its repeated approvals of the same instruction language (United States v. Bauer, United States v. Stanton, United States v. Anderson, United States v. Campbell) and reasoned that “medically unnecessary” concepts were relevant at least to fraud counts, and in any event the instruction described a method of proving knowledge rather than diluting the mens rea requirement.

C. Impact

  • Patient-death evidence in prescribing cases: The decision provides published Sixth Circuit support for admitting overdose/death evidence when tied to a defendant’s knowledge and continued dangerous prescribing, while also underscoring trial courts’ responsibility to enforce a “connectivity” limitation and consider limiting instructions.
  • Post-offense regulatory change as defense evidence: The opinion strengthens the government’s ability to exclude later policy shifts (like repeal of the X-waiver caps) under Rule 403 when the temporal gap invites juror confusion and the probative value is thin.
  • Ruan implementation: The court signals that instructions tracking Ruan’s language will generally suffice without supplementary malpractice-versus-crime gloss, reducing the likelihood of successful instructional attacks where the instruction already requires subjective knowledge of unauthorized prescribing.
  • Joint-trial administration: The decision continues the Sixth Circuit trend of rejecting severance based on spillover arguments absent concrete, individualized prejudice—especially when juries are instructed to compartmentalize evidence.

IV. Complex Concepts Simplified

  • “Pill mill”: A clinic that appears medical but primarily exists to generate high-volume controlled-substance prescriptions for cash, often with minimal exams and disregard of diversion/red flags.
  • “Authorized” prescription (controlled substances): A prescription is “authorized” when issued for a legitimate medical purpose in the usual course of professional practice (21 C.F.R. § 1306.04(a)), and after United States v. Ruan the government must prove the prescriber knew they were acting outside that authorization.
  • Diversion: When patients sell or transfer prescribed medication instead of using it as directed. Awareness of diversion is a “red flag” that can support proof of knowledge.
  • Rule 401 vs. Rule 403: Evidence can be relevant (Rule 401) but still excluded if its main effect is unfair prejudice or confusion that substantially outweighs probative value (Rule 403).
  • Hearsay vs. “effect on the listener”: An out-of-court statement is hearsay only if offered for its truth. If offered to show what someone heard and how that prompted action (e.g., reporting diversion, quitting), it may be non-hearsay.
  • Deliberate ignorance (“willful blindness”): A doctrine allowing knowledge to be inferred when a person suspects a fact (like fraud or unauthorized prescribing) but intentionally avoids confirming it.
  • Harmless error: Even if the trial court made a mistake, an appellate court will affirm if the mistake likely did not affect the verdict given the whole record.
  • Rule 35 (sentence correction): A narrow window allows correction of certain sentencing errors; under United States v. Hall, the district court must act within 14 days of announcing the sentence.

V. Conclusion

The Sixth Circuit’s decision affirms sweeping convictions stemming from a “pill mill” prosecution and reinforces several durable themes in post-United States v. Ruan litigation: subjective knowledge may be proven circumstantially through pervasive red flags and continued abnormal practices; jury instructions closely tracking Ruan will generally be upheld; and many evidentiary disputes will be resolved through Rule 403 balancing and harmless-error analysis when the government’s case is strong.

Most notably, in a published opinion the court expressly endorsed the evidentiary principle that patient overdose/death evidence can be admissible to demonstrate knowledge or wanton disregard—so long as trial courts enforce a meaningful “connectivity” requirement tying that evidence to the defendants’ awareness and conduct. This guidance will likely shape how pill-mill cases in the Sixth Circuit litigate the probative value and permissible scope of death-related proof going forward.