Last updated 09:04, May 16 2018
Corey Andrew Challis, 34, will be likely be sentenced to jail after admitting two child sex abuse pornography charges.
A previously convicted man has been found with another 29,380 child sex abuse images on a laptop he used for work.
Christchurch District Court Judge Stephen O'Driscoll declined to order a home detention assessment for Corey Andrew Challis, who admitted two charges on Wednesday.
That means the 34-year-old labourer faces jail time, nine years after he received a community work and supervision sentence for similar offending.
After he pleaded guilty to six charges of possessing child sex abuse images in 2009, he was kicked in the shin and verbally abused by someone who had been sitting in the public gallery.
Judge O'Driscoll remanded Challis on bail for sentencing on August 8.
Defence counsel Kerry Cook said Challis would continue to undergo psychological counselling to progress his rehabilitation, at his own expense.
"There is a strong public interest in him continuing to do so."
The court was told that between October 2016 and March 2017, Challis acquired and stored images and video files depicting the sexual abuse and exploitation of young girls on a laptop computer that he used for work. He also copied files to a portable hard disk drive, from the laptop and from an older computer he had at home.
The files listed in the charges were on the laptop, and on the external hard drive.
More than 11,000 files depicted the sexual exploitation of girls as young as 5, and more than 450 video clip files were found showing girls as young as 8 undressing and performing sexual acts.
Challis admitted the offending when he was interviewed by the Department of Internal Affairs. He said he searched for child sexual exploitation material online and downloaded it for his own sexual gratification. He agreed he engaged in sexual fantasy involving young girls. He said he had been viewing material featuring young girls for at least five years.
He agreed his viewing of sexual material involving young girls was exploitative, but said "if I wasn't there it would be happening anyway".
The department said he co-operated with the investigation and gave an honest account of his online activities. The department referred him to the STOP programme for sexual offenders.