Whether the evidence permitted the trial court to reject Galloway's insanity defense and find him guilty but mentally ill.
Holding
No. The evidence was without conflict and led only to the conclusion that Galloway was legally insane at the time of the killing.
Reasoning
Indiana's insanity defense requires a defendant to prove by a preponderance of the evidence both a mental disease or defect and an inability, because of that condition, to appreciate the wrongfulness of the conduct at the time of the offense. A mentally ill defendant who does not establish that cognitive incapacity may be found guilty but mentally ill. Although a defendant challenging the rejection of an insanity defense appeals from a negative judgment and receives substantial deference, appellate review cannot become a rubber stamp: reversal is required when the evidence is without conflict and supports only insanity.
Expert testimony is advisory rather than conclusive, and a factfinder may reject even unanimous expert testimony. But it must have probative evidence from which it can reasonably infer sanity. Such evidence may include credible expert disagreement, informed lay testimony about the defendant's mental state around the offense, or demeanor evidence that meaningfully conflicts with the insanity evidence.
The experts did not actually disagree. Dr. Davidson's preliminary opinion that Galloway was sane was based on incomplete information. After learning that Galloway had been psychotic and delusional in the days before the killing and had called his grandmother the devil while stabbing her, Davidson withdrew his opinion and stated that he could not give one. An expert's inability to give an opinion is not affirmative, probative evidence of sanity.
There was also no conflicting lay testimony. The eyewitnesses and other witnesses familiar with Galloway's condition described signs that he was entering a psychotic episode. His aunt recognized the wild look he displayed immediately before the stabbing as the look he got before he would "lose it," and witnesses heard him call his beloved grandmother the devil. Other family and friends had observed his deteriorating condition in the days and hours before the crime.
The demeanor evidence on which the trial court relied was neutral when viewed in context. Galloway's ability to shop, eat lunch, buy gasoline, and cooperate with police did not reasonably show that he could appreciate the wrongfulness of the killing, particularly given his lengthy history of psychosis, the absence of evidence that he feigned illness, and the powerful evidence of delusion during the crime. A psychotic person need not look like a stereotypical "raging lunatic" at every moment.
Other circumstances cited by the trial court likewise did not support sanity. The unplanned stabbing of a grandmother whom Galloway loved, in front of family members and while calling her the devil, did not suggest rational awareness of wrongdoing. His later incompetence to stand trial and his failure to take medication were also not probative of his mental state at the time of the offense; indeed, the record showed that medication noncompliance caused his psychotic deterioration. Nor was his alert and cooperative courtroom demeanor nearly a year later probative of his mental state during the killing.