A Lizard in a Woman’s Skin

Carol was arrested because her fingerprints were found on the murder weapon and the fur coat at Julia's apartment. Additionally, she had described the exact murder method to her psychoanalyst before it occurred, including the fur coat and paper knife, which made her the prime suspect in Inspector Corvin's investigation.

Earlier, Carol described vivid dreams of killing Julia while wrapped in a fur coat, which later matched the crime scene exactly.

The fingerprints were never fully explained within the film. While Carol was in custody, the forensic evidence placed her prints on both the paper knife and Julia's fur coat, creating the appearance of guilt. However, the film leaves ambiguity about whether she actually handled these items during the murder or if her dream state somehow caused contact with them.

The film presents conflicting possibilities. Edmund Brighton confesses to Julia's murder in a suicide note, claiming responsibility. However, Inspector Corvin suggests Carol may have killed Julia to prevent her affair with Frank from being exposed, implying Edmund's confession might be a deliberate cover to protect his daughter. The hippie couple also had contact with Julia that night but claim memory loss from LSD.

The phrase 'a lizard in a woman's skin' was mentioned by the hippie couple when questioned about the night of Julia's murder. They claimed they could not recall the details due to LSD use. The phrase appears to reference the predatory, cold-blooded nature of the killer, suggesting someone who moved among people disguised as harmless. The film never fully explains whether this was a hint about Carol's potential guilt or merely drug-induced rambling.

Edmund Brighton committed suicide and left a note confessing to Julia's murder. The apparent reason was to protect his daughter Carol from conviction, as he could not bear to see her face justice. However, Inspector Corvin later suggests Edmund's confession might have been a calculated lie designed to give Carol an alibi by creating the impression that someone else was guilty, allowing her to avoid exposure for the real motive, concealing Frank's affair.

Joan, Frank's teenage daughter from a previous marriage, was found murdered in a field the day after the confrontation at Alexandra Palace. The hippie couple, specifically Hubert, was identified as her killer. It appears they murdered Joan to silence potential witnesses who might expose their involvement in the broader conspiracy surrounding Julia's death and their stalking of Carol.

The hippie couple, Hubert and Jenny, were arrested and admitted to stalking Carol and murdering Joan, but they claimed memory gaps about the night Julia was killed. While they appeared in Carol's dream and were present in her visions, the film never definitively links them to Julia's death. Their involvement remains ambiguous, though they clearly had some connection to the events surrounding the family.

Carol's dreams featured the hippie couple, and she saw them in real life shortly after Julia's murder.

Julia Durer was blackmailing Frank Hammond over his affair with his personal secretary, Deborah. Edmund Brighton discovered that Julia had been threatening to expose the infidelity, which would have damaged the family's political and social standing. This secret became a key piece of evidence suggesting Carol might have had a motive to silence Julia, protecting her family's reputation from the scandal of Frank's infidelity.

The film deliberately maintains ambiguity about Carol's guilt. While the evidence (fingerprints, dream prophecy) points toward her, the narrative suggests multiple possibilities: she may have killed Julia unconsciously in a dream-state, she may have done so deliberately to protect her family's secrets, or she may be entirely innocent while others manipulated events. Inspector Corvin strongly implies her guilt at the end, but the audience is left to decide.

Carol's dreams depicted the murder in vivid detail before it occurred, blurring the line between premonition and action.

The film never provides a definitive explanation for Carol's prophetic dreams. Several possibilities are suggested: she may have witnessed the murder planning unconsciously, she may have been manipulated by the hippies or another party, or the dreams represent genuine precognition. The blurring of dream and reality is central to the film's psychological horror, leaving the mechanism behind the predictions intentionally mysterious.

Edmund Brighton received an anonymous phone call from Julia Durer offering damaging information about his family. This call raised fears about loyalty and potential betrayal within their inner circle. Carol later learned of this call from Edmund, and Inspector Corvin uses this knowledge to construct a timeline suggesting Carol had sufficient information about Julia's threats to orchestrate her murder.

Edmund Brighton committed suicide after discovering the web of secrets surrounding his family, Frank's affair with Deborah, Julia's blackmail, and Carol's potential involvement in the murder. Rather than face the collapse of his family's reputation and potentially testify against his daughter, Edmund chose to confess to Julia's murder in a note and end his own life, attempting to close the case while protecting Carol.

The hippie couple, Hubert and Jenny, were confirmed LSD users. Their testimony about Julia's murder was heavily compromised by their drug use, as they claimed complete memory loss of that night. The film suggests their LSD-induced state may have contributed to their violence against Joan and their involvement in the broader events, though the extent of their drug-induced actions remains unclear.