On February 10, 2026, the Missouri Court of Appeals, Eastern District, issued its opinion in State of Missouri v. Derrie S. Williams, No. ED113255, affirming the denial of post-conviction relief under Missouri Supreme Court Rule 29.15. For individuals and families navigating serious felony convictions, post-conviction proceedings can represent the last meaningful opportunity to challenge errors that occurred at trial. This case highlights the high burden a defendant must meet when alleging ineffective assistance of counsel.
What Is a Rule 29.15 Motion in Missouri?
Under Missouri law, Rule 29.15 allows a person convicted after trial to seek post-conviction relief on limited grounds—most commonly ineffective assistance of counsel. It is not a second appeal. Instead, the movant must prove:
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Counsel's performance fell below the standard of reasonably competent representation; and
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The deficient performance prejudiced the outcome of the case.
This standard comes from the U.S. Supreme Court's decision in Strickland v. Washington and is strictly applied by Missouri courts.
In Mr. Williams's case, he alleged two primary errors by trial counsel:
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Counsel prevented him from testifying in his own defense.
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Counsel failed to investigate and call two witnesses who could support an alibi.
The motion court denied relief after an evidentiary hearing, and the Court of Appeals affirmed.
Allegation #1: Right to Testify in a Missouri Criminal Trial
A criminal defendant has a constitutional right to testify in his or her own defense. However, that right may be waived—so long as the waiver is knowing and voluntary.
In this case, the trial court conducted a detailed on-the-record colloquy with Mr. Williams. The judge asked whether he had discussed the decision with his attorney, whether he understood he could testify, and whether the decision was his own. Mr. Williams repeatedly answered “Yes, sir” and confirmed the choice was his.
At the post-conviction hearing, trial counsel testified that he advised against testifying due to concerns about prior statements made to police. He further testified that the ultimate decision belonged to Mr. Williams.
The Court of Appeals emphasized two important principles:
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Once a defendant knowingly waives the right to testify, counsel's advice about testifying is generally considered trial strategy.
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Strategic decisions do not constitute ineffective assistance absent “exceptional circumstances.”
Because the record showed a clear, voluntary waiver and consistent testimony from both trial counsel and Mr. Williams, the appellate court found no clear error in denying relief.
What This Means for Defendants
Courts place tremendous weight on the trial record. If a defendant tells the judge, under oath, that the decision not to testify is voluntary, it becomes extremely difficult to later claim otherwise.
For clients, this underscores the importance of:
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Thorough consultation with trial counsel,
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Fully understanding the risks and benefits of testifying,
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Raising concerns immediately if you disagree with counsel's advice.
Allegation #2: Failure to Investigate and Call Witnesses
The second claim focused on trial counsel's alleged failure to investigate and call two potential alibi witnesses: a co-worker and a family member.
Under Missouri law, to succeed on a failure-to-investigate claim, a movant must prove:
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What information counsel failed to discover;
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That reasonable investigation would have uncovered it; and
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That the information would have improved the defense.
Additionally, to prevail on a failure-to-call-witness claim, the movant must show that the witness would have provided a “viable defense.”
At the evidentiary hearing:
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The co-worker testified he arrived late to work and was asleep at the time of the shooting, meaning he could not confirm the defendant's whereabouts.
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The family member testified the defendant left for work before 7:00 a.m., but the shooting occurred at approximately 7:50 a.m., leaving a critical gap in time.
The Court held that neither witness provided testimony that “unequivocally” supported an alibi defense. Because the testimony was weak and potentially unhelpful, trial counsel's decision not to call them was considered reasonable trial strategy.
Why This Matters in Post-Conviction Cases
Many post-conviction claims center on “missed witnesses.” However, Missouri courts require more than speculation. The proposed testimony must clearly and materially aid the defense.
If a witness's testimony is uncertain, incomplete, or potentially damaging, courts will typically defer to counsel's strategic judgment.
The Standard of Review: “Clearly Erroneous”
Perhaps the most important takeaway from this opinion is the limited scope of appellate review.
The Court of Appeals does not re-try the case. It asks only whether the motion court's findings were “clearly erroneous.” If reasonable evidence supports the motion court's decision, the appellate court will affirm.
In Mr. Williams's case, the appellate court deferred to the motion court's credibility findings and concluded no clear error occurred
Key Takeaways for Missouri Criminal Defendants
If you are pursuing or considering post-conviction relief in Missouri:
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The burden of proof is high.
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Trial strategy decisions are heavily protected.
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On-the-record waivers are extremely difficult to overcome.
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Witness claims must show strong, concrete exculpatory value.
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Appellate courts defer substantially to motion courts.
Rule 29.15 motions are technical, deadline-driven, and procedurally strict. Success requires detailed factual development, careful evidentiary presentation, and a deep understanding of Missouri post-conviction law.
Beal & Whitener represents clients throughout Missouri in the area of criminal defense, including throughout Northeastern Missouri Counties: Scotland County, Clark County, Lewis County, Knox County, Shelby County, Marion County, Monroe County, Ralls County, Pike County, Lincoln County, Audrain County, Montgomery County, Warren County, Saint Charles County, St. Louis County, St. Louis City and Southeastern Counties: Jefferson County, Franklin County, Gasconade County, Crawford County, Washington County, Saint Francois County, Saint Genevieve County, Perry County, Madison County, Iron County, Bollinger County, Cape Girardeau County, Wayne County, Butler County, Stoddard County, Scott County, Mississippi County, New Madrid County, Dunklin County, Pemiscot County and Central Missouri Counties: Boone County, Callaway County, Cole County, Osage County, Maries County, Phelps County, Dent County, Shannon County, Oregon County, Carter County, Ripley County.
