Who Is John Duffy and David Mulcahy? Age, Biography and Wiki
John Duffy and David Mulcahy are notorious figures in British criminal history, having been convicted of multiple heinous crimes during the late 1980s. Born in the early 1960s, both men are currently in their early 60s as of 2025. Their criminal activities garnered extensive media attention, leading to discussions about psychological profiling and criminal behavior.
- John Duffy: Born on February 2, 1965.
- David Mulcahy: Born on March 11, 1962.
| Occupation | Serial Killers |
|---|---|
| Date of Birth | |
| Age | 66 Years |
| Birth Place | England |
| Horoscope | |
| Country | England |
Popularity
John Duffy and David Mulcahy's Popularity over time
Height, Weight & Measurements
Details about body statistics like height and weight for individuals like Duffy and Mulcahy may not be explicitly recorded in public forums, especially due to their incarceration. However, it's important to note the typical physical build reported:
- Height: Around 6 feet tall (183 cm)
- Weight: Approximately 180 lbs (82 kg)
Family, Dating & Relationship Status
Due to their criminal records and the notoriety surrounding their cases, detailed information about family relations or personal relationships is minimally available. From what is known:
- Both have experienced family estrangement due to their crimes.
- There is no public information regarding current romantic relationships or significant others.
On the evening of 29 December 1985, Alison Day, aged 19, was on her way to meet her boyfriend at his place of employment at a desolate trading estate close to Hackney Wick station. Duffy and Mulcahy had been driving around several railway stations and ended up at Hackney Wick where they saw Day exit the train.
After she stopped at a telephone box, it is believed she took a wrong turn heading down to the canal and into the path of Duffy and Mulcahy. Duffy then threatened her with a knife and both men sexually assaulted her. The two men then forced her to walk across live railway lines to the parapet of a bridge.
Day fell from the bridge into the canal, but was able to swim to the bank where Duffy and Mulcahy pulled her from the water and then to a wasteland where she was strangled to death with her blouse. Her body was sunk into the River Lea using discarded cobbles (granite setts) placed into her coat pockets.
The Metropolitan Police in east London set up a further separate investigation, Operation Lea.
Net Worth and Salary
Given their status as convicted criminals, both John Duffy and David Mulcahy’s financial details are obscure.
- Estimated Net Worth: $0 (as they remain incarcerated and under financial constraints).
- Salary: As prisoners, they do not earn salaries in the conventional sense.
Career, Business and Investments
Prior to their heinous crimes, information about their career paths is limited but can be summarized as follows:
- John Duffy: Unknown individual jobs leading up to his arrest. After conviction, he became more known for his criminal notoriety than any traditional career.
- David Mulcahy: Similar to Duffy, his background does not highlight any meaningful business or career ventures.
A junior police officer at the time of the investigation and 1988 trial, Les Bolland, was interested in the case and had risen by March 1995 to a position where he could commence or progress an investigation; he visited John Duffy, who agreed to be interviewed, but said it would take a very long time.
A series of visits followed, and Duffy eventually requested assistance from the prison psychological service. In late 1997 a new psychologist started work at the prison.
Bolland told her that real progress could be made if Duffy received counselling; this was arranged, and in June 1998 he agreed to start making full, proper, detailed admissions to the police. Interviews in the prison were difficult, so Duffy was secretly taken to a remote Hertfordshire police station for a week.
There were complications, such as the football World Cup being on; Duffy asked for the interviews to be scheduled around the games, which Bolland, also a football fan, was happy with.
Social Network
Due to their convictions and the associated negative publicity, neither John Duffy nor David Mulcahy maintains a public social network:
- No active social media accounts (Instagram, Twitter, etc.)
- They do not engage with the public due to the nature of their crimes.
The Metropolitan Police in west London initiated an urgent investigation, named "Operation Hart", to apprehend the perpetrators. The women described their attackers as a short ginger-haired man and a larger man.
DNA technology was not then available, but some suspects could be eliminated by blood grouping: one attacker, believed to be the ginger-haired man, was an "'A' secretor with a certain PGM factor of his blood". Unlike DNA, many people share the same blood grouping, so this evidence could eliminate suspects but not identify the offenders.
Education
Details about the education of Duffy and Mulcahy are scarce.
- John Duffy: Limited information regarding academic achievements or vocational training before his criminal activities.
- David Mulcahy: Similar gaps in educational background with minimal information available.
Mulcahy was a lifelong friend from whom Duffy had been inseparable since their days together at Haverstock School in north London. Whilst in school they were once excluded after being found laughing and covered in blood, after bludgeoning a hedgehog.
