The First Deadly Sin (1980) Timeline Explained – Every Event in Order

Delaney throws himself into the investigation partly to cope with his anxiety about Barbara's condition. While at the scene of the first murder, he learns she has undergone emergency kidney surgery due to complications from stones. Rather than staying at the hospital, he persues the killer obsessively, using the case as a distraction from his fear and helplessness. His drive to solve the crime intensifies as Barbara's condition deteriorates, and his suspicion of Dr. Bernardi's competence deepens his distrust of the medical system.

• delaney
• wife
• hospital
• investigation
• obsession

Christopher Langley, the Arms and Armor curator at the Met, explains that the unusual spherical wound could only be produced by a tool-like implement, not a conventional blade. The round impact pattern results from the axe striking with a specific angle and force, crushing rather than cutting the skull. This insight leads Delaney to a hardware store, where the clerk confirms an ice axe fits the description perfectly.

• ice axe
• weapon
• wound
• langley
• forensic

Daniel Blank is a wealthy, socially prominent figure who lives in a luxury high-rise. The investigation traces ice axe purchases to his address, and Delaney discovers Blank has been present at murder scenes, cleaning up afterward. The film portrays him as a cold, methodical killer operating with apparent impunity due to his social connections. However, the specific psychological motive for his killings is not deeply explored, he appears to kill with ritualistic precision but without clear explanation for his crimes.

• daniel blank
• killer
• serial killer
• motive
• wealthy

Delaney and Langley use the ice axe as their key lead. A sporting goods store owner provides addresses of everyone who purchased that specific model of ice axe. The compiled addresses point directly to Daniel Blank, whose profile as a wealthy socialite contrasts sharply with the brutal nature of the murders. As Delaney closes in, Blank becomes increasingly reckless, leading to the climactic confrontation.

• ice axe purchase
• address list
• sporting goods store
• blank location

In the climax, Delaney confronts Blank in his luxury apartment. Blank, still maintaining his air of respectability, attempts to report Delaney for breaking and entering while casually speaking on the telephone to an operator. Rather than waiting for backup or attempting an arrest, Delaney shoots Blank in the head with his WW2-era Luger pistol. The film presents this as a hard-won but costly victory, Delaney achieves justice but at the cost of his own moral standing and career.

• shooting
• arrest
• blank
• confrontation
• luger

Delaney retrieves a World War II-era Luger pistol from his home closet, a weapon that has become a personal relic from his past. The Luger represents both his history in law enforcement and the violence he has witnessed throughout his career. Using this particular gun to kill Blank underscores the personal nature of the confrontation and marks a definitive end to Delaney's career in law enforcement.

• luger
• ww2
• pistol
• weapon
• delaney memorabilia

Barbara Delaney's condition continues to worsen after her emergency kidney surgery. The film shows her growing increasingly weak as Delaney is absorbed in the case. In the final scene, Delaney sits beside her in the hospital, reading to her as she fades. She dies while he holds her hand, bringing a quiet, devastating personal ending to the story. Her death represents the personal cost Delaney pays for his obsessive pursuit of justice.

• barbara
• wife
• death
• hospital
• delaney loss

As Delaney closes in on Blank, the killer makes one final attempt to strike. A victim fights back and manages to escape Blank's attack, but is subsequently struck by a passing car. This tragic consequence underscores the randomness of violence and the fragility of life, even when escape seems possible, fate intervenes cruelly.

• victim
• escape
• car accident
• blank attack

Christopher Langley, the Arms and Armor curator at the Metropolitan Museum of Art, provides the crucial breakthrough in identifying the weapon. His expertise in historical weapons leads him to conclude that the spherical wound could only be produced by a tool-like implement rather than a conventional blade. He visits a hardware store and deduces the weapon is an ice axe, then helps trace the specific model to a sporting goods store where customer purchase records lead directly to Blank.

• christopher langley
• curator
• ice axe identification
• met museum

After shooting Blank in his apartment, Delaney returns to the police precinct where he retires from the force. The desk sergeant informs him that Blank's body has been found, and Delaney confirms his retirement as he walks out. His career ends not with a celebration but with quiet finality, the cost of catching the killer has taken its toll personally and professionally, and he chooses to leave behind the life that defined him.

• retirement
• precinct
• career end
• delaney