Nefarious (https://www.imdb.com/title/tt14537248/) is based on a true story of a death row criminal who was being investigated by a psychiatrist to determine whether or not he's "insane" and should evade the death penalty.
The twist? The death row criminal has been possessed by an evil entity which calls itself "Nefariamus". The evil entity has a gleeful time boasting to the psychiatrist that heaven and hell are very real, and that hell (in the entity's opinion) is winning. The movie is mostly about the dialog between the entity and the psychiatrist (the psychiatrist is the one who wrote the book about his experiences that the movie is based on).
Good flick Although it ain't the 2023 one which is awesome
Nefarious (https://www.imdb.com/title/tt14537248/) is based on a true story of a death row criminal who was being investigated by a psychiatrist to determine whether or not he's "insane" and should evade the death penalty.
The twist? The death row criminal has been possessed by an evil entity which calls itself "Nefariamus". The evil entity has a gleeful time boasting to the psychiatrist that heaven and hell are very real, and that hell (in the entity's opinion) is winning. The movie is mostly about the dialog between the entity and the psychiatrist (the psychiatrist is the one who wrote the book about his experiences that the movie is based on).
Ya that's the one. It's on Tubi.