|“||Who are you, little man? I see you.||”|
— Tapp observes Zep in Gordon's apartment[src]
Due to his work on the Jigsaw case, Detective David Tapp soon became obsessed with the idea, that the renowned oncologist Dr. Lawrence Gordon was the killer. However when his decisions led to the death of his partner, Detective Steven Sing, Tapp was discharged from the Metropolitan Police Department. Because of this, Tapp decided to continue the investigation on his own and rented an apartment right across from Dr. Gordon's apartment so he could observe him.
The apartment itself was a run-down one-room flat. Its walls were covered graffity and numerous articles about the case, even some by Globe Staff writer Oswald McGillicutty. Due to his unstable state of mind and his obsession with Gordon, Tapp severely neglected both himself and the apartment, causing it to go to rack even more. As the apartment was very small, Tapp had to work and sleep in his living room. In there he had a safe where he kept all his notes about the case. He also had a picture of his late partner to remind him of the night of his death. In order to observe Gordon, Tapp had a camera tripod standing right behind his window. The recordings were broadcasted to his TV screen which he had turned into a surveillance monitor. (Saw)
One night, Lawrence Gordon's apartment was invaded by Zep Hindle, an orderly who worked at the Angel of Mercy Hospital just like Gordon himself. When Gordon left his apartment to meet his medical student and mistress, Carla, in a hotel, Zep took Gordon's wife and daughter, Alison and Diana Gordon, hostage and tied them to a bedpost in Alison and Lawrence's bedroom. After tying them up and gagging them, Zep stepped to the window. Unbeknown to him, Tapp was still observing the house and filmed him. However due to the curtains were drawn closely, Tapp didn't notice the hostages.
At 6:00 o'clock, Zep was going to kill Diana and Alison as he was told to by the Jigsaw Killer. However Alison managed to get free and engaged in a fight with him, causing him to accidentally trigger several shots. These shots were heard by David Tapp. Realizing the danger, Tapp grabbed his weapon and stormed out to save Gordon's family. (Saw)
In other Media
Following his pursuit of Zep Hindle, David Tapp was shot and taken to the Whitehurst Insane Asylum, where he had to play one of Jigsaw's games on his own. In the end he had to decide to whether let go of his obsession with stopping Jigsaw or to continue his private vendetta against the killer. Eventually Tapp decided to cease from his hunt, causing him and all the other victims at Whitehurst to be released. However Tapp didn't manage to overcome his obsession. Shortly after his game he returned to his apartment and committed suicide by shooting himself in the head.
Following his death, Tapp's apartment was searched by Jennings Foster, Detective Joseph Poltzer and Chief Henry Jacobs in the presence of Tapp's estranged son, Michael. While Jennings and Jacobs were friendly, Poltzer harshly told him to go away while he was trying to open the safe containing Tapp's notes. Michael left the apartment and met Sarah Blalok, a drug dealer and police informant, when she entered her flat. Following their brief encounter, Michael went outside to have a smoke, when he was approached, sedated and abducted by a person with a pig mask.
Throughout his own Jigsaw game, Michael found numerous case files and notes from his father. According to those, Tapp had initially concealed the truth about Steven Sing's death. However he recorded his confession about the events on an audio tape. When Michael visited the father, the latter went to a nearby store to buy pomegranate juice for his son. Embracing his opportunity, Michael stole the tape as several of Tapp's notes and then disappeared before his father came back. Shortly afterwards he published the truth of Sing's death in order to get a job at a newspaper publishing company, making him the one who caused his father's discharge from the force.
Another note stated that Tapp had stolen files from the police station to continue his investigations on his own. However his colleagues found out about it. One day Tapp returned to his apartment when an officer was about to break the door open. Following this, the files were confiscated.
Following Tapp's disappearance at the night of the Gordon familie's captivity, Detective Ron Willis and his colleagues searched his apartment where they found Tapp's notes and therefore learned about his obsession with Gordon. Willis was later interviewed for the documentary Full Disclosure Report, which focused on Jigsaw's early crimes, and revealed these details to the audience.
- Tapp's apartment is the only location from the movies which is also visited in the video games.