Not Guilty By Reason Of Insanity (NGRI)
Here's your citation in American Psychological Association (APA) format:
Not Guilty By Reason Of Insanity (NGRI). (n.d.). In Alleydog.com's online glossary. Retrieved from: https://www.alleydog.com/glossary/definition-cit.php?term=Not+Guilty+By+Reason+Of+Insanity+%28NGRI%29