In a statement issued to media today, Customs said it became aware in January 2014 that Healy was downloading and trading objectionable material. His city apartment was searched and his electronics taken for forensic analysis.
Healy was in hospital at the time, and the phone he had with him held more images, Customs said.
"These are images of young children and babies suffering sexual violation and horrific abuse. People who view or trade such images contribute to their continued abuse, and need to be prosecuted," Maurice O'Brien, Customs Manager Investigations, said.
"There's no one type of offender. They vary in age, occupation and social status. They commit crimes in the privacy of their homes or on their cell phones. They hide behind anonymity online. But they don't offer the same anonymity to their victims."
The Objectionable Publications and Indecency legislation that received Royal Assent earlier this month and becomes effective on May 7, will double maximum penalties for importing or exporting objectionable material to 10 years under Customs legislation.