Cavazos v. Smith

Background

A grandmother, Shirley Ree Smith, was convicted after a jury found she caused the death of her 7-week-old grandson, Etzel. Medical experts at trial disagreed: three prosecution doctors testified the baby died from violent shaking, while defense experts offered other explanations including sudden infant death syndrome or older trauma. The California Court of Appeal upheld the conviction and Smith was sentenced to 15 years-to-life. Smith sought federal habeas relief, arguing the evidence was insufficient, and the Ninth Circuit overturned the state ruling.

Reasoning

The Supreme Court reversed the Ninth Circuit and restored the state court result. The Court explained that when juries hear conflicting expert testimony, it is their job to decide which experts to believe. Federal courts may not replace a jury’s judgment simply because they prefer a different view of medical evidence. Under the federal law limiting review of state convictions, a federal court can overturn a state decision only if that decision was objectively unreasonable. Applying those rules, the Court concluded the appeals court improperly reweighed the experts and failed to defer to the jury and the state court.

Real world impact

The ruling means that disputed medical testimony, even when controversial, will often be left to juries and state courts, and federal judges will be more limited in granting relief. People convicted after trials with conflicting expert evidence will face higher hurdles in federal challenges. The decision remands the case for further proceedings consistent with the opinion, so this is not a new trial on the facts.

Dissents or concurrances

Justice Ginsburg, joined by Justices Breyer and Sotomayor, dissented, arguing the Court should not have summarily reversed. The dissent emphasized medical uncertainty about shaken baby diagnoses and Smith’s weak risk to society, urging fuller review rather than summary reversal.