Song of the Thin Man

Tommy Drake was killed by Mitchell Talbin. Talbin murdered Drake to cover up the fact that his wife Phyllis had used her valuable necklace to pay off Drake's $12,000 debt to gangster Al Amboy. When Drake threatened to expose the scandal, Talbin shot him from behind in Brant's office.

Earlier, Drake mentions he quits the band after securing a better booking through Mitchell Talbin, hinting at their financial connection.

Mitchell Talbin killed Tommy Drake because Drake was about to expose that Phyllis Talbin had pawned her necklace to pay off his $12,000 debt to Al Amboy. This would have revealed both the financial scandal and the affair between Phyllis and Drake. When Drake confronted Talbin about the unpaid debt, Talbin shot him to keep the truth hidden.

The receipt found on the back of sheet music shows the debt was paid, but by whom remains unclear until the truth emerges.

Mitchell Talbin also killed Fran Page. After Drake's murder, Fran had information about the crime and threatened to sell it. Talbin stabbed her in the back at her apartment to silence her. This second murder was committed to prevent her from revealing what she knew about the Drake killing.

The timeline shows Fran called Janet Thayar to sell information, suggesting she knew something dangerous.

Buddy Hollis confessed to killing Tommy Drake because he was emotionally unstable and being treated at a sanitarium. When Nora visited him alone, he became agitated and falsely confessed while brandishing an antique gun. Nick Charles was skeptical of the confession because Drake's murder was a precise, calculated shot, unlike the erratic behavior Buddy displayed.

Earlier scenes establish Buddy as volatile and mentally unstable, making an impulsive false confession plausible.

The necklace was the key clue that revealed the true killer. Amboy's wife wore a necklace identical to Phyllis Talbin's earrings. When the necklace later appeared on Phyllis's neck, Nick pressed her for answers. Phyllis then revealed she had given the necklace to Amboy to pay off Drake's debt, exposing her affair with Drake and her husband's motive for murder.

During the staged party, Amboy's wife appears wearing the necklace that matches Phyllis's earrings, creating the visual clue that cracks the case.

Phil Brant was suspected because Drake was killed in his office aboard the S.S. Fortune, and Brant had refused to advance Drake the $12,000 to pay Al Amboy. Additionally, Brant had eloped with Janet Thayar, creating tension with her father David Thayar. A bullet narrowly missed Brant, making him both a suspect and a potential target.

The timeline shows Drake was killed immediately after Brant refused to help him, establishing immediate suspicion.

The fatal bullet that killed Tommy Drake came from an antique gun in David Thayar's extensive collection. Nick Charles deduced this after learning the bullet's origin likely traced to an antique weapon. One gun was missing from Thayar's collection, providing the murder weapon and linking the crime to the Thayar household.

Nick and Nora's visit to Janet reveals the antique gun connection, narrowing the weapon's origin.

Nick Charles identified Mitchell Talbin as the killer through several clues: the receipt showing Drake's debt was paid despite his murder; the necklace that Phyllis used to settle the debt; and Talbin's nervous behavior during questioning. At the staged party, Nick gathered all suspects and exposed the connections, leading Talbin to confess and draw his gun.

Nick quietly investigated aboard the Fortune, discovering the receipt and gathering testimony from band members about potential enemies.

Phyllis Talbin shot her husband Mitchell after he confessed to killing Tommy Drake and Fran Page and drew his gun on Nick Charles and the others. When Mitchell pulled his weapon, Phyllis shot first, wounding him, and then fired again, killing him despite Nick's pleas to stop. She acted to prevent Mitchell from harming anyone else and possibly to protect her own secrets.

The confrontation occurs during the staged party aboard the Fortune when all suspects are gathered.

Tommy Drake's $12,000 debt to Al Amboy was paid by Phyllis Talbin using her necklace. Although Drake was killed before he could pay himself, Phyllis had already given the necklace to Amboy to settle the debt. The receipt Nick found on the sheet music confirmed the debt was paid, though it didn't reveal who paid it until Phyllis's confession.

The receipt found behind sheet music shows payment was made, but the payer remains unknown until the party revelation.