Ricky Thurston v. Frank Vanihel, 39 F.4th 921

In 2006 a woman (T.K.) was raped in a park; cigarette butts from the scene later yielded a partial male DNA profile that matched an existing unknown profile from another Marion County rape (case IP06051889, “case‑889”).
A year later the DNA profile matched Ricky Thurston; he was arrested, confessed to using the vehicle described by the victim but denied being at the park or knowing her, and was tried for rape in 2012.
At trial the lab report summarizing DNA from the cigarette butt (Exhibit 16) included an unredacted sentence saying the cigarette profile was consistent with a "sperm fraction" from case‑889; defense counsel did not notice or object and the exhibit went to the jury.
Two jurors submitted questions about the case‑889 reference; the court refused to ask those questions to witnesses and later instructed jurors not to speculate about unanswered questions; Exhibit 16 was sent back to the jury unredacted.
Thurston was convicted and sentenced; on post‑conviction review he argued ineffective assistance of counsel under Strickland for failing to object/redact and failing to mitigate prejudice; the Indiana Court of Appeals found no Strickland prejudice because the case‑889 reference was too vague and jury instructions mitigated speculation.
The federal district court denied 28 U.S.C. § 2254 habeas relief; the Seventh Circuit affirmed, holding the state court’s prejudice determination was not an unreasonable application of Strickland under AEDPA.

Issue	Plaintiff's Argument (Thurston)	Defendant's Argument (State)	Held
Whether counsel’s failure to object to/adapt Exhibit 16 (reference to case‑889 "sperm fraction") deprived Thurston of effective assistance (prejudice under Strickland)	The unobjected reference implied Thurston was linked to another rape, inflaming the jury and likely changing the verdict; counsel’s omission was not tactical and prejudiced the defense	The reference was vague, unelaborated, and not tied to a suspect; jury instructions and absence of further mention prevented forbidden propensity inference and cured any prejudice	No Strickland prejudice; state court reasonably concluded the vague reference, jury instructions, and other evidence did not undermine confidence in the verdict
Whether the Indiana Court of Appeals’ denial of Strickland relief was an unreasonable application of federal law under AEDPA	The state court ignored weaknesses in the prosecution’s case and failed to weigh all evidence holistically as required by federal precedent	The state court considered the record holistically and properly applied Strickland/AEDPA deference; its conclusion was within fairminded disagreement	AEDPA deference applies; the Seventh Circuit held the state court’s decision was not unreasonable and affirmed denial of habeas relief

Strickland v. Washington, 466 U.S. 668 (1984) (establishes deficient performance and prejudice test for ineffective assistance)
Buck v. Davis, 137 S. Ct. 759 (2017) (explains prejudice requires a reasonable probability the result would differ)
Harrington v. Richter, 562 U.S. 86 (2011) (likelihood of different result must be substantial, not merely conceivable)
Weeks v. Angelone, 528 U.S. 225 (2000) (presumption that juries follow instructions)
Bruton v. United States, 391 U.S. 123 (1968) (jury instructions can limit harmful inference from evidence)
Wong v. Belmontes, 558 U.S. 15 (2009) (courts must consider the whole record when assessing prejudice)
Dassey v. Dittmann, 877 F.3d 297 (7th Cir. en banc 2017) (use the last reasoned state‑court decision when reviewing federal claims)
Cook v. Foster, 948 F.3d 896 (7th Cir. 2020) (discusses AEDPA limits on federal habeas review)