The diaphragm taken after sex with Carolyn

The diaphragm taken after sex with Carolyn is an absent object whose significance rests on a forensic report and Painless Kumagai’s interpretation of it. The report identifies contraceptive jelly in Carolyn Polhemus’s body; because no diaphragm was found during the autopsy, Painless argues that someone removed it. He identifies that someone as the killer and treats the missing device as part of a theory about the crime’s staging, not as an independently verified object or a proven account of what happened.

Forensic Basis

A report from the forensic chemist’s office identifies nonoxynol 9 in Carolyn Polhemus’s body. Based on the concentrations, the chemist concludes that the substance came from spermicidal jelly. Painless further specifies a two-percent concentration and a cellulose-gum base, and explains that this kind of jelly is used with a diaphragm. The findings therefore establish the presence of contraceptive material, but the diaphragm itself is not recovered or described as having been directly observed.

That distinction gives the object its particular evidentiary status. The report supplies a material trace; Painless connects that trace to a device that is absent. His conclusion depends on the relationship between the jelly and the method of contraception he identifies. It is a forensic inference, rather than a documented chain from a recovered diaphragm to the scene. The object’s importance comes precisely from this gap between what the report detects and what the investigators can physically account for.

Absence and Inference

When Rusty Sabich asks whether a diaphragm was missed during the autopsy, Painless rejects the suggestion. He says the autopsy involved examining Carolyn Polhemus’s body and maintains that no diaphragm was present. Rusty then asks where it went. Painless’s answer is that somebody took it. He rules out the police and himself, and concludes that the person who removed it was the killer.

The exchange turns an absence into an investigative clue, but it does not close every evidentiary question. No recovered device is presented, and the passage does not establish who removed it through direct observation or other corroborating evidence. Painless’s reasoning instead links three points: the chemical trace, his understanding that the jelly was used with a diaphragm, and the device’s absence from the autopsy. The resulting claim is consequential, but its source remains an investigator’s interpretation of those facts.

Painless Kumagai’s Theory

Painless places the missing diaphragm within a larger account of the killing. In his theory, the killer is Carolyn Polhemus’s lover: he visits her, they have drinks, and they have intercourse before he becomes angry and kills her. Painless further proposes that the killer attempts to make the crime appear to be a rape, binds her, and removes the diaphragm. The device thus connects the evidence of prior contraception to Painless’s proposed sequence and to his interpretation of how the scene was staged.

This is presented as Painless’s theory, not as a settled reconstruction. The forensic report supports the presence of spermicidal jelly, and Painless insists that there was no diaphragm at the autopsy; his account of the killer’s relationship, actions, and purpose goes beyond those reported findings. Keeping that distinction clear matters: the missing object gives his explanation a specific evidentiary hinge, but does not by itself demonstrate the identity or motive of the killer.

Investigative Significance

Rusty initially struggles to understand the implication of the report and questions Painless about whether the autopsy could have missed the device. As the conversation continues, he recognizes the direction of Painless’s argument and becomes angry. He then asks what Tommy Molto thinks. Painless does not give a substantive answer; his attempt to respond ends in a wheeze. The scene therefore leaves the theory’s standing within the wider investigation unresolved rather than showing that Molto accepts it.

The diaphragm matters both as a proposed missing piece of physical evidence and as a test of competing interpretations. The report identifies a substance; Painless supplies a possible connection between that substance, an absent contraceptive device, and a killer’s conduct. The leap from trace to object, and from object to a staged crime, is where the clue acquires its force—and where its limits remain visible. Its narrative function is not to deliver a confirmed solution, but to make an omission in the autopsy newly legible as a possible act by the killer.