In 1981 he was convicted for "conspiracy to corrupt public morals" over the contact ads section of the PIE magazine and was imprisoned, and once again in 2002 on charges of evading a prohibition on the importation of indecent photographs of children stemming from nude photographs that O'Carroll had taken of children on the beaches of Qatar. At the time, he was working on a book about the musician and philanthropist Michael Jackson who was later acquitted of charges brought against him regarding indecent behavior towards a child.
Later, O'Carroll was arrested once more on suspicion of conspiring to distribute indecent photographs of children after supplying an undercover Met police officer who infiltrated the pedophile advocacy groups with a cache of child pornography obtained from his co defendant, Michael John De Clare Studdert's collection. He was arraigned 1 June, 2006 on child porn charges. In September 2006, he admitted to two counts of distributing indecent images of children.
- Men jailed for making and distributing indecent images of children - Metropolitan Police Service
- "Pair admit to child porn charges," September 2006, BBC.
- Irish paedophile faces sentencing in UK
- Paedophile rights campaigner jailed for child porn distribution - breakingnews.ie
- "Paedos' champ arrested", The Sun, Mike Sullivan, date unknown
- "Police charge man over child sex ring", by Olivia Richwald, The Northern Echo, 1 June 2006
- BBC NEWS | UK | England | Coventry/Warwickshire | Two jailed for child porn library