Clark v. State, 309 Ga. 566

Jennifer Clark was convicted of malice murder and related offenses for the November 18, 2008 killing of her ex-husband, Donald Clark; sentence included life plus consecutive terms.
Clark had an extramarital affair with Michael Yost; Yost lived with the family and later participated in disposing of Donald’s body.
Yost pleaded guilty to murder, concealing a death, and tampering with evidence in exchange for his testimony at Clark’s trial; he also had prior burglary convictions.
Physical evidence included blood, cleaning chemicals in the home, a badly decomposed body found in the woods, Donald’s wallet, boots, and the bat; medical testimony supported death by blunt force or asphyxia.
Clark testified that Yost acted alone and coerced her; the State presented Yost’s admissions, his plea, and other witness and forensic evidence.
Clark appealed, arguing trial counsel was constitutionally ineffective for failing to request a jury instruction permitting the jury to consider Yost’s felony convictions when assessing his credibility; the Georgia Supreme Court affirmed.

Issue	Clark's Argument	State's Argument	Held
Whether trial counsel was ineffective for not requesting a jury instruction that prior convictions (Yost’s murder, tampering, concealing death, burglaries) could be used to impeach his credibility	Counsel’s failure was deficient and prejudicial because the State’s case relied heavily on Yost’s testimony	No prejudice: counsel extensively cross-examined Yost about his convictions and inconsistent statements, argued his unreliability to the jury, and the court charged generally on credibility and impeachment	No reversible error; Clark failed to prove Strickland prejudice, so ineffective-assistance claim fails and convictions affirmed

Strickland v. Washington, 466 U.S. 668 (1984) (two-prong test for ineffective assistance: deficiency and prejudice)
Jackson v. Virginia, 443 U.S. 307 (1979) (standard for sufficiency of evidence review)
Green v. State, 304 Ga. 385 (2018) (no prejudice where witness’s convictions and inconsistencies were known and jury instructed on impeachment)
Romer v. State, 293 Ga. 339 (2013) (performance judged by prevailing professional norms)
Wesley v. State, 286 Ga. 355 (2010) (discussing Strickland framework in Georgia context)
Lawrence v. State, 286 Ga. 533 (2010) (appellate note on burdens in ineffective-assistance claims)
Garland v. State, 311 Ga. App. 7 (2011) (no prejudice where witness admitted plea deal and prior felonies and jury was instructed on impeachment)
Hinely v. State, 275 Ga. 777 (2002) (trial court instructions on witness credibility and negotiated pleas relevant to impeachment)