After Dmitri leaves Perkhotin, the official is naturally suspicious. He wonders how Dmitri got his hands on such a large amount of money, when he had been so obviously broke just hours before. Perkhotin snoops after Dmitri, learning about the brass pestle from Grushenka’s maid. Then, rather than going to Fyodor Pavlovich’s, he goes to Madame Khokhlakov’s house, where he learns that Madame Khokhlakov refused to give Dmitri a loan. Perkhotin remembers that Fyodor Pavlovich has kept 3,000 rubles on hand in his attempt to seduce Grushenka, and he suddenly worries that Dmitri has stolen the money from his father.
Perkhotin goes to tell the police about his fear, but he finds that the station is already a hubbub of activity. Grigory’s wife has made another report to the police. Fyodor Pavlovich has been murdered.
Suspicion immediately falls on Dmitri, and he is quickly arrested. Dmitri protests his innocence, but no one believes him. Grushenka vows that she loves him despite his crime and even says that she is to blame for having deliberately toyed with both Dmitri’s and Fyodor Pavlovich’s affections.
Dmitri pleads innocent, but he cannot deny any of the circumstantial evidence that confronts him. He hated his father and knew about his father’s 3,000 rubles. He also owed that same sum to Katerina, and took the brass pestle from Grushenka’s. Finally, he traveled to his father’s just before the old man was murdered. The only question Dmitri refuses to answer is about the source of the cash he obtained shortly after leaving his father’s estate.
The officers continue to question Dmitri and to explore the evidence against him, trying to decide whether to charge him formally or set him free. Convinced that the truth is his ally, Dmitri seems to try to answer their questions honestly, but his evasions about the money continue to make him appear suspicious.
The officers search Dmitri’s clothes and find that they are stained with blood. After the officers take his clothing as evidence, Dmitri becomes enraged with the prosecutors.
Dmitri finally reveals the source of the money. He says that when he borrowed the 3,000 rubles from Katerina, he only spent 1,500 rubles on Grushenka. He wore the other 1,500 in a locket around his neck. But once he decided to kill himself, he decided there was no reason to hold onto the 1,500 rubles, so he spent some of it on wine and food for his last meeting with Grushenka.
The problem is that Dmitri has always told people that he spent the entire 3,000 rubles on Grushenka, and the prosecution is now able to produce several witnesses who say that he told them he needed the full 3,000 rubles to repay Katerina.
Grushenka is called in to testify. Dmitri swears to her that he did not kill his father, and she believes him. But the officers nevertheless decide to keep him in prison to await a trial. Dmitri says good-bye to Grushenka, asking her to forgive him for everything he has done. Grushenka delivers an impassioned promise to love and remain loyal to Dmitri forever.
This book is devoted to a description of the circumstantial evidence that makes Dmitri appear guilty of Fyodor Pavlovich’s murder. The question of whether Dmitri is guilty symbolically represents the greater question of whether human nature is fundamentally good or sinful, so the legal proceedings against Dmitri represent the trial of the human spirit. Just as Book V, especially in the Grand Inquisitor chapter, presents the novel’s indictment of God, Book IX begins its indictment of humanity. This book recounts Dmitri’s past in detail, and the stories of his innumerable sins are retold, as though to summarize the moral failings that lie at the heart of the case. Dmitri has lied to everyone, stolen from and cheated Katerina, turned to violence against Grigory, and been unable to control his passions for Grushenka. In short, he has committed the most common and universal sins of mankind.
Dmitri’s bizarre, almost gleeful reaction to this list of sins reveals the seeds of his redemption. In Zosima’s anecdote of the murder in Book VI, Dostoevsky has drawn our attention to a peculiar psychological phenomenon: the desire of a guilty man to confess his guilt. The murderer in this anecdote had gotten away with his crime, but he could never find happiness because he was desperate to confess his guilt. As Zosima indicates in his argument with Ivan over ecclesiastical courts in Book II, conscience is the sternest judge of all. Even a criminal who has gotten away with his crime can be judged by his conscience. Like the murderer in Zosima’s anecdote, Dmitri has a conscience that judges him harshly, and also like the murderer, Dmitri is guilty, not of the charge of killing his father, but of all the lies, acts of violence, and other sins of his past. Like the murderer, part of Dmitri longs for his crimes to be known and judged, so he can find redemption in the suffering of his punishment. Dmitri’s glee throughout this passage is due in part to Grushenka’s declaration of love for him. But he also experiences relief to be in the hands of the police and to hear his crimes discussed openly and critically. This review of his past sins may seem like a damning indictment of humanity, but it is actually the first step in Dmitri’s transformation from a tormented and sinful man into a faithful and loving one.