The Florida Supreme Court overturned a defendant's death sentence and remanded the case for a new penalty phase in Caraballo v. State, 39 So. 3d 1234 (Fla. 2010). At issue was the penalty phase, during which the state used the testimony of a mental health expert who had evaluated the defendant's competence to stand trial. The defendant appealed, asserting that the trial court erred in admitting this testimony.