The Bloodstained Butterfly

A young French woman whose murder in the park triggers the investigation and a high-profile trial. Her alleged threat to report Marchi provides a motive that drives initial suspicions. Her death casts a shadow over the lives involved, fueling a web of rumors and legal maneuvers.

A TV sports host who is arrested for Françoise's murder and later subjected to a retrial. His relationship with Maria and the perception of his character complicate the case, making him a focal point of public scrutiny. He dies in the climactic confrontation, after the truth about the killer is revealed.

A young pianist who begins a relationship with Sarah and is later revealed as a killer behind the later park murders. He is also Françoise's lover, adding a layer of betrayal to the trail of violence. His calculated actions drive the final confrontation and the unraveling of the case.

Wife of Alessandro Marchi, whose affair with Cordaro becomes a disruptive thread in the legal saga. Her position within the marriage and the courtroom dynamics impacts the retrial and the perception of truth. She stands at the center of personal betrayals that influence the case.

The lead investigator who tracks the string of park murders and taunting calls from the killer. He navigates the complexities of the case, balancing procedural scrutiny with the evolving twists. His role anchors the pursuit of truth amid deception.

The defense attorney who manipulates the courtroom narrative to protect his own affair with Maria. His strategic choices influence the retrial and reveal the moral ambiguity within the legal system. He becomes a key figure in the web of deceit surrounding the case.

Marchi's mistress whose presence enters the retrial narrative, adding another layer of romantic complication to the legal drama. Her involvement highlights the personal entanglements that color the pursuit of justice. She is a catalyst for shifting loyalties and revelations.

Daughter of Marchi and a friend of Françoise; she becomes involved with Giorgio, linking the romantic plot to the serial killings. Her relationships place her at the center of motive and danger as the investigation evolves. She embodies the personal stakes behind the courtroom drama.

A cast member listed without detailed involvement in the summary; her role is not specified in the provided material. She remains part of the wider cast context for the film.

The official who prosecutes the case against Marchi, setting the stage for the courtroom drama. His work frames the initial narrative of guilt and innocence that the retrial later unsettles. He represents the judicial authority in the central conflict.

Assistant to Inspector Berardi, supporting the investigation as the case unfolds. His role helps advance the procedural elements of the pursuit and the unraveling of evidence. He contributes to the sense of a methodical inquiry in a tense, high-stakes scenario.