The Boston Strangler (1968) Timeline Explained – Every Event in Order

With traditional investigation yielding no breakthroughs and the killer striking repeatedly across jurisdictions, investigators were desperate for new leads. Bottomly brought in psychic Peter Hurkos, who profiled Eugene T. O'Rourke as a severely masochistic suspect matching the killer's psychological profile. While unconventional, this was an attempt to generate fresh leads when conventional detective work had stalled.

Foreshadowing: Earlier failed interrogations and the lack of physical evidence had left investigators increasingly frustrated.

• Peter Hurkos
• psychic
• Eugene O'Rourke
• investigation
• leads

O'Rourke was taken in for ten days of psychiatric observation, but while he was under surveillance, another murder occurred in Boston. This new killing proved O'Rourke could not have been the Boston Strangler since he was being watched at the time, forcing investigators to abandon this lead and reconsider their approach.

Foreshadowing: The psychic's tip had pointed to O'Rourke, creating a false sense of progress.

• Eugene O'Rourke
• cleared
• alibi
• murder
• observation

After DeSalvo was apprehended for attempted breaking and entering, Bottomly and Detective DiNatale visited Dianne Cluny, the surviving victim who had bitten her attacker. In the hospital elevator afterward, they noticed DeSalvo had a wound on his hand that matched Cluny's account of biting him during her escape. This physical evidence linked DeSalvo directly to the attack on Cluny and shifted suspicion toward him as the Strangler.

Foreshadowing: DeSalvo's earlier escape from Cluny's apartment left him with a distinctive wound.

• Albert DeSalvo
• Dianne Cluny
• wound
• bite
• evidence
• connection

Dr. Nagy believed DeSalvo suffered from dissociative identity disorder, with a "normal" personality that fabricated memories to shield a separate "killer" identity responsible for the murders. This explained why conventional interrogation failed, each personality was unaware of the other's actions. The doctor warned that forcing the hidden identity to confront its crimes could trigger catatonia.

Foreshadowing: DeSalvo's inconsistent statements during earlier interviews had puzzled investigators.

• split personality
• dissociative identity
• Dr. Nagy
• catatonia
• confession

Bottomly faced mounting pressure to solve the case and knew that conventional interrogation methods had failed due to DeSalvo's split personality. With defense counsel restricting what could be admitted in court, Bottomly conducted final interviews outside those constraints. He concluded that forcing the hidden personality to confront its crimes was worth the risk, believing a catatonic DeSalvo would be the "second-best outcome" to an actual conviction. The resulting catatonia left the case legally unresolved.

Foreshadowing: Dr. Nagy had warned that the shock of confrontation could be dangerous.

• Bottomly
• catatonia
• interrogation
• confession
• legal
• outcome

DeSalvo left his wife and children on November 22, 1963, under the pretense of work during the televised funeral of John F. Kennedy. The chaos and national distraction during this moment provided cover, most people were indoors watching the funeral, making it an opportune time for DeSalvo to approach Dianne Cluny's apartment undetected.

Foreshadowing: The film specifically notes this timing as DeSalvo's opportunity window.

• JFK funeral
• timing
• attack
• opportunity
• distraction

During DeSalvo's attack, Cluny fought back and bit his hand hard enough to draw blood, causing a distinctive wound. When DeSalvo was later apprehended and Bottomly encountered him in the hospital elevator, the detectives noticed the fresh wound on his hand. Cluny's description of biting her attacker became crucial physical evidence linking DeSalvo to her assault and, by extension, to the Strangler attacks.

Foreshadowing: DeSalvo had been startled by his reflection and fled before completing the attack.

• Dianne Cluny
• bite
• wound
• hand
• identification
• survivor

After being caught attempting to break into another apartment, DeSalvo was evaluated and found incompetent to stand trial on the charges of attempted breaking and entering. The court committed him to a hospital for psychiatric observation rather than proceeding with criminal prosecution at that time.

Foreshadowing: DeSalvo had been apprehended while trying to enter a home where the husband was present.

• incompetent
• trial
• psychiatric
• observation
• commitment

After Bottomly forced the hidden personality to confront its crimes, DeSalvo slipped into a catatonic state. This created a legal and procedural crisis, the psychological breakthrough had revealed the killer's identity, but DeSalvo could not stand trial. The case remained in limbo, with the confession inadmissible in court and no resolution to the legal proceedings. The true scope of the killings was revealed, but justice remained uncertain.

Foreshadowing: Dr. Nagy had warned that catatonia was a real risk of the confrontation.

• catatonic
• confession
• case
• unresolved
• legal
• limbo

DeSalvo was startled by his own reflection in a mirror while attempting to subdue Cluny. This moment of self-recognition appears to have destabilized him psychologically. Cluny used this distraction to break free from her bindings and fight back, biting his hand hard enough to draw blood. DeSalvo fled into the night rather than completing the attack.

Foreshadowing: The mirror reflection created an unexpected psychological break in the assault.

• mirror
• reflection
• flee
• Dianne Cluny
• attack
• psychological