Mangione to mount emotional-disturbance defense in UnitedHealthcare CEO murder trial

Luigi Mangione is set to argue an emotional-disturbance (psychiatric) defense in the murder case involving UnitedHealthcare’s CEO, contending the act was sparked by an extreme emotional disturbance. Experts say proving such a defense requires psychiatric testimony about his state of mind, while prosecutors argue he planned the attack; pre-trial proceedings in Manhattan also touched on unsealed psychiatric materials and other evidence, underscoring the defense’s potential challenges.