The Pearl of Death

Conover was released because the pearl was not found on his person when he was arrested. He had hidden the Borgia Pearl inside one of six identical Napoleon busts during his escape, so when the police searched him at the scene of the theft, they found nothing incriminating. Without the pearl in his possession, there was insufficient evidence to hold him, and he walked free, allowing the larger scheme to unfold.

The Hoxton Creeper uses his signature killing method, breaking his victims' spines and leaving them surrounded by shattered china, as a form of brutal intimidation and to create a distinctive crime scene signature. This method connects all the murders to him and serves as a terrifying calling card that Holmes uses to track Conover's criminal network.

Holmes traced the connection between all the murder scenes, noticing that each crime occurred near a Napoleon bust. He then learned from the bust workshop that Conover had fled through the premises during his escape and had concealed the pearl inside one of six identical busts. By tracking the vendor who supplied the busts, Holmes narrowed down which busts had been sold and which one remained unaccounted for.

Holmes psychologically manipulated The Creeper by implying that Naomi Drake, whom The Creeper cared for deeply, would be harmed or killed. Using this leverage, Holmes convinced The Creeper that Conover was responsible for threatening Naomi's life. Driven by loyalty and fear for Naomi's safety, The Creeper turned on Conover and killed him in a frenzied attack.

Conover was desperate to recover the pearl because it was the stolen property that could link him directly to the original heist. Without the pearl in his possession, he had been released by police, but possessing it again would have meant valuable leverage, profit, and proof of his criminal accomplishment. Additionally, the pearl's legendary cursed nature added to its worth and the lengths Conover would go to retrieve it.

Holmes tracked down the vendor who had sold the six Napoleon busts and identified which five had been purchased, leaving one bust unaccounted for. From there, he traced the final bust to its owner and arranged to take the owner's place before Conover and The Creeper arrived, setting up the trap that would expose their scheme.

Naomi Drake, Conover's accomplice, is referenced when Holmes uses her as leverage to turn The Creeper against Conover. While the film does not show her fate directly, Holmes implies her life is in danger to manipulate The Creeper into betraying Conover. She is not among the characters killed in the final confrontation, suggesting she escaped or was rescued after the criminals were neutralized.

Conover made two attempts on Holmes's life, but Holmes's keen observational skills and deductive reasoning allowed him to anticipate the threats. Each time, Holmes outmaneuvered the assassins, staying one step ahead. In the final confrontation at the bust owner's house, Holmes had already taken the owner's place, turning the ambush into a trap for the criminals themselves.

The six Napoleon busts served as the crucial hiding place for the stolen pearl. When Conover fled the museum, he ran through a workshop producing these busts and concealed the pearl inside one of them. The identical nature of the busts made it nearly impossible for anyone to determine which one held the pearl without destroying all of them, creating the central puzzle Holmes had to solve.

Holmes recognized that each murder scene contained a Napoleon bust, linking the killings to the pearl's hiding place. He deduced that Conover, unable to retrieve the hidden pearl himself while being pursued, had ordered his right-hand man The Creeper to eliminate anyone who might have information about the busts or the pearl's location. The murders were attempts to silence potential witnesses and cover tracks.

When Holmes smashes the final bust and recovers the pearl, he notes that it carries "the blood of five more victims on it." This refers to the five additional deaths caused by The Creeper, two murder victims plus Conover and The Creeper themselves, that occurred as a direct result of the pearl's theft and the effort to recover or protect it. It adds a dark, ominous note to the recovered jewel's history.

The Creeper had romantic feelings for Naomi Drake, Conover's accomplice. This emotional connection is what Holmes exploited during the final confrontation. By implying that Naomi's life was in danger and that Conover was responsible, Holmes manipulated The Creeper into betraying and killing his own boss, demonstrating how personal attachments can be weaponized in criminal circles.