Porter v. McCollum

Background

A Korean War veteran, George Porter, was convicted of two murders and received a death sentence for one of them. At trial he represented himself for much of the process and his standby lawyer handled only the penalty phase. That lawyer presented almost no background or mental-health evidence. Years later, a postconviction hearing produced extensive new mitigation: a history of severe childhood abuse, heroic but traumatic combat in two Korean War battles, multiple combat wounds and decorations, long-term heavy drinking, and expert testimony of brain damage and mental impairment.

Reasoning

The central question was whether Porter’s lawyer performed so poorly that it unfairly affected his death sentence. The Court found counsel’s investigation fell short of professional norms because the lawyer never sought school, military, medical, or family records and did not interview relatives. Reviewing the totality of mitigation evidence, the Court concluded that the unpresented evidence — combat trauma, cognitive deficits, abusive childhood, and substance abuse — likely would have influenced the jury and sentencing judge. It held the Florida courts unreasonably discounted that evidence and that Porter showed prejudice under the standard for ineffective assistance.

Real world impact

The Court reversed the federal appeals court judgment, granted habeas relief on the ineffective-assistance claim, and sent the case back for further proceedings. The decision does not disturb Porter’s underlying conviction challenge. It stresses that, in capital cases, sentencers must be able to consider relevant life-history and mental-health evidence that defense lawyers fail to uncover.