The Casino Murder Case

A gentleman detective whose elegance and analytical mind drive the investigation. He relies on observation, deduction, and precise questioning to uncover contradictions in alibis. Vance is calm, witty, and relentlessly logical, often outmaneuvering suspects with well-phrased inquiries.

Vance's ally and Mrs. Llewellyn's secretary, Doris quickly grasps the significance of the letter and the handwriting on the will. She is practical, perceptive, and unafraid to push for answers. Her rapport with Vance evolves into a supportive partnership as the case unfolds.

A wealthy, volatile husband whose outward charm masks a ruthless willingness to kill to secure control. He manipulates others and tries to stage a perfect crime, revealing a narcissistic need for self-preservation. His plan is undone by Vance's deductions as the truth comes to light.

The formidable matriarch who runs the Llewellyn household, her quarrels with Lynn and others reveal a sharp, controlling mind. She embodies upper-class authority and the friction between tradition and change. Her presence anchors the family drama that underpins the mystery.

The elder statesman-like uncle who appears to pull strings behind the scenes. His unusual collection of chemistry books and a hidden laboratory hint at deeper conspiracies. While he becomes a prime suspect, the plot casts him as a decoy rather than the killer, adding to the intrigue.

Mrs. Llewellyn's daughter who admits to quarrels with Virginia, highlighting the family's fraught dynamics. She stands to benefit from the shifting will, making her a person of interest in the broader conspiracy. Her testimony contributes to the mosaic of motives surrounding the murder.

The district attorney who questions suspects and marshals the legal framework around the case. He serves as a foil to Vance, presenting traditional investigative methods. His role emphasizes due process and the procedural path to truth.

The Llewellyn maid who knows the household's secrets and assists in pivotal moments, including loading Lynn's gun with blanks for a crucial bluff. Her presence underscores the importance of staff in mansion-based mysteries. Becky’s actions reflect loyalty and practical cunning.

The police sergeant who helps stake out the casino and assists Vance in pursuing the truth. He embodies steadfast law-and-order presence and acts as a trusted ally in a tense confrontation. His role accelerates the investigation toward a dramatic resolution.