Bruner visits Moore in his jail cell, where he convinces her to allow him to tell the rest of Emily's story despite her boss's threat.
A distraught Bruner retreats to her office, where her boss threatens her with termination if she allows Moore to testify again. Cartwright's testimony to authenticate the exorcism and refute the prosecution's medical case is prevented when he is suddenly struck and killed by a car.
Graham Cartwright, a medical doctor who attended the exorcism, gives Bruner a cassette tape on which the exorcism was recorded, and Moore presents the recording as evidence. Bruner supports Moore by summoning anthropologist Sadira Adani to testify about the beliefs surrounding spiritual possession from various cultures, but Thomas dismisses her claims as nonsense. Moore warns her she may be a target for the demons, revealing he too has experienced similar phenomena on the night he was preparing the exorcism. Bruner begins experiencing supernatural phenomena at home, waking up at 3:00 AM to the smell of burning material. Moore, wanting to tell Emily's story, gives his testimony when he is called to the witness stand. Moore surmised that Emily's medications were to blame for the unsuccessful expulsion, as they paralyzed Emily's brain activity and kept the demon out of reach. With the consent of Emily's parents, Moore subjected Emily to an exorcism that ultimately failed. Moore was consulted when her condition failed to improve, and his assessment and observations led him to the conclusion that Emily was being possessed by a demon. She returned to her parents' home and was treated with epilepsy and psychosis medications. Emily had dropped out of her college studies after being consistently struck by delusions and muscle spasms at 3:00 AM.
Prosecutor Ethan Thomas interrogates several doctors and neurologists to establish a medical cause for Emily's death, particularly epilepsy and schizophrenia. During the trial, the statements of the witnesses are visualized via flashbacks. While the archdiocese want Moore to plead guilty to minimize the crime's public attention, Moore instead pleads not guilty. The writers confused it with some individuals' ability to produce two different fundamental frequencies by vibrating each of the true vocal folds at different rates, but the act of forming words is not determined at the vocal fold level, but by resonances created by the positions of the articulators in the vocal tract.Erin Bruner, an ambitious lawyer seeking to become a senior partner in her law firm, takes the case of Father Richard Moore, a Catholic diocesan priest charged with negligent homicide following an attempted exorcism of 19-year-old student Emily Rose. The prosecutor uses the term "dual voices" as if it means two separate actual voices, as if "voice" was being produced by two distinct sets of vocal folds, which is not possible in humans. However, they cannot be "activated" in the sense that a muscle can, and would not produce a different "voice." At most, some harmonic overtones or vibratory interference (such as that heard in Tibetan chanting) might be heard. The FVF can be recruited by powerful airflow and/or by disciplined muscular movements by the muscles surrounding them. He calls them "duel sets," consisting of the "superior vocal cords" and the "primary ones." They are correctly known colloquially as "true vocal folds" and "false vocal folds." The FVF are called "false" because they are made up of membrane, whereas the true folds have a deep layer of muscle tissue and can be controlled. The prosecutor is only partially correct in that humans have two sets of vocal cords (they are properly known as vocal "folds").