James tells Horatio the night that Sarah died, he fell asleep on the couch, woke up and heard his wife screaming. He says he fought with a masked man with a knife and ended up with the weapon. James says he tried to wake up his daughter, but she was dead. He remembers he found Todd on the ground. James tells Horatio he wants to help him find the person who attacked his family. Horatio learns that James was stealing pills and selling it on the streets.

Calleigh meets with a man named Donald Newhouse who is on the list of James's clients. Newhouse admits he bought the pills, but he didn't kill James's family. He explains he developed an addiction for painkillers and went to James. He says he was at a meeting during Sarah's murder. Ryan tells Newhouse he is free to go, but not to leave town.

Eric reads the neighbor's report that she saw James stab his wife again and again. Eric meets with the neighbor, Mrs. Russo, and asks her where she was when she witnessed the attack. Russo remembers when the S.A. tried to convince Mrs. Russo that she witnessed the attack from the living room instead of the kitchen which had an obstructed view. Eric tells Jesse that since he was the officer on the scene, he noticed that he changed the report to place Russo in the living room instead of the kitchen. Jesse remembers when the S.A. told him to change the report so James would not get away with the attack.

Jesse explains to Eric that he thought what he did was right. Eric tells Horatio that Russo saw the attack from the kitchen. Horatio informs them that there is another witness.

Horatio meets with Todd who tells him that his father insists he is innocent. Todd remembers a loud vehicle drive by during the attack. He says he got up when he heard his mother scream, then saw someone on top of his mother. After Todd asks if there is a chance that his dad didn't commit the crime, Horatio says they will have to find out.

Eric tells the team they should check if Sarah was sexually assaulted before she was murdered. While they go through clothes, Boa Vista finds what she thinks might be a semen sample. Jesse tells Eric he is not to blame for what went wrong during the case. Boa Vista scans the fluid for DNA and finds a match to Newhouse.

Calleigh asks Newhouse how he got semen on Sarah's clothes the night she was murdered. She informs him that Todd reported he saw someone on top of Sarah. Newhouse admits he was having an affair with her. He states he quickly got dressed, kicked out the window and escaped after James came home.

Boa Vista tells Walter and Ryan she got a hearing aid and was cleared to work. They go to the home and sees that it has been unchanged since the murder. Walter sprays luminol and finds traces on the window that Newhouse kicked out. They wonder how the blood got on Newhouse's foot when he kicked out the window. They figure Newhouse was the one who stood over Sarah's dead body.

Ryan informs Newhouse they found evidence that he killed Sarah. Newhouse admits he was with Sarah, snuck out, but forgot his wallet. He says he heard a noise and saw Sarah dying on the floor. He says he retrieved his wallet, then kicked out the window. Calleigh tells Newhouse that it doesn't look good for him.

Jesse and Eric meet with Russo and show her the picture of Newhouse, but she doesn't recognize him. She insists she saw James kill Sarah. Jesse asks Russo to testify later in court. As Russo crosses the street, she is run down by a man in a Prius that doesn't have plates.

Tripp arrests the driver, Phillip, who hit Russo. He explains it was an accident, but Tripp finds a map with Russo's name on it and a gold bar in his vehicle.