People v. McKinley
The case involves a defendant convicted of second-degree murder, first-degree assault, and criminal possession of a weapon after stabbing his parents, killing his father, and injuring his mother. The defendant appealed the conviction, primarily asserting an insanity defense and challenging several evidentiary rulings. The court upheld the striking of a psychiatrist's testimony due to the doctor's unfamiliarity with the New York legal standard for criminal responsibility. Additionally, the court found no error in excluding a therapist's testimony as an expert or certain forensic mental health file contents, nor in excluding an outdated psychiatric diagnosis from 1970. The judgment was unanimously affirmed, citing overwhelming evidence of guilt and harmless error even if certain testimony had been admitted.