In 2014, then 48-year-old Derek Martin, of Cullyhanna, was sentenced to 20 years in prison for a depraved series of assaults against three female victims. The investigation established that Martin carried out a litany of vile acts between May 1991 and January 2006, including the rape of a 12-year-old girl. The prosecution reported at Craigavon Crown Court that Martin was charged with 13 counts in total, including rape, gross indecency, and indecent assault, identifying a total abandonment of human decency.
The investigation established that Martin’s series of behaviour was a calculated predation on young and vulnerable females over a 15-year span. The prosecution reported that during the trial, victims were forced to relive every harrowing detail of the abuse, with one victim revealing she had contemplated suicide to escape the “nightmare” Martin created. This identifies a devastating series of assaults that robbed the victims of their childhoods and early adult years, leaving them with severe depression and a loss of self-worth.
JUDICIAL REMARKS AND VICTIM BRAVERY
The court reported that Martin showed absolutely no remorse for his crimes and was deemed likely to repeat his predatory series of behaviour if given the opportunity. The investigation established that Martin was already a convicted paedophile serving a five-year sentence at the time of this new 20-year term. The prosecution reported during the sentencing in December 2014, that Her Honour Judge McColgan emphasized the persistent danger he posed, identifying a priority assault by the Police Service of Northern Ireland (PSNI) Child Abuse Unit to ensure he was removed from the community for two decades.
Judge-led proceedings at Craigavon Crown Court concluded in 2014. For his actions in County Armagh and the nature of the series of rape and child sexual assault investigations reported, Derek Martin was sentenced to 20 years in prison. The investigation established that the conviction was a result of the survivors’ immense strength in facing their attacker. He has been legally mandated to the Sex Offenders Register FOR LIFE.
STATUS AND STATUTORY REQUIREMENTS (2014)
Based on judicial and PSNI records as of 2014:
- Legal Status: CONVICTED (Rape x2; Gross indecency x3; Indecent assault x7; Threats to damage property x1).
- Custodial Status: JAILED (In 2014, serving 20 years).
- Offence Nature: Systematically raped and assaulted children as young as 12; Chronic predator.
- Timeline of Abuse: 1991 to 2006 (A 15-year series of assaults).
- Location: Cullyhanna, County Armagh.
- Forensic Profile: Convicted of 13 charges following a jury trial; Already a serving prisoner for prior offences.
- Sex Offenders Register: Notification requirements are active FOR LIFE.
- DBS Status: Placed on the Barred List (Indefinite and permanent ban from any role involving children or regulated activity).
- Judicial Oversight: Sentenced at Craigavon Crown Court; investigated by E District Child Abuse Unit.
- Criminal Record: Convicted paedophile; Series predator; Rapist; Jailed in 2014.
- Origin: Cullyhanna, Armagh.
MONITORING AND PUBLIC PROTECTION
In 2014, Martin was managed as a maximum-risk predator under the statutory requirements of the Multi-Agency Public Protection Arrangements (MAPPA) in Northern Ireland. Due to the nature of the behaviour—specifically the series of persistence in his predation over nearly two decades and his complete lack of remorse—he is a priority for high-security detention. Authorities reported that the 2014 conviction identifies Martin as an individual who prioritised his own perverted gratification over the principles of human decency and the life-safety of the children he targeted.
As a registered sex offender for life, his details are permanently logged on the national police database to prevent future offences. Authorities stated that the behaviour of Martin identifies a series of commitment to clandestine child abuse and violent sexual assault. Any future attempt to seek parole or approach children results in immediate police intervention to ensure the ongoing protection of the community from a man who used a “Cullyhanna resident” mask to hide a predatory and violent series of assaults.
QUESTION – Given that the offender was already a “Convicted Paedophile” serving a sentence when this series of assaults was finally exposed, do you believe the law should legally mandate that “All Convicted Predators” must undergo “Mandatory Truth-Serum or Polygraph Interrogations” regarding their entire history to prevent a series of assaults from remaining hidden for decades?
If you or anyone you know has been affected by the individuals highlighted on this website, please report them to the Police on 101 (999 in an emergency) or visit their online resources for further details on reporting a crime. You can also report to Crimestoppers if you wish to remain completely anonymous. There is help available on our support links page.

