Gardaí are warning parents to be wary of what their children are accessing online, and the dangers that exist.
It follows the sentencing of two teenage boys for the murder of 14-year-old schoolgirl Ana Kriegel.
Boy A was sentenced on Tuesday to life in prison, with a review after 12 years.
He was also handed an eight year period of detention for aggravated sexual assault - a sentence that will run alongside the other sentence.
Boy B will serve 15 years, which will be reviewed after eight.
During the trial, it emerged that Boy A had viewed large amounts of pornography online, some of it violent.
Superintendent John Gordon, who was part of the investigating team, says children's internet access needs to be monitored.
"Children's access and viewing should be monitored, it should be age-appropriate, and it is a matter for individual parents to discuss that with their children.
"They should be very wary and conscious of what's available on the internet and the dangers that are in existence there".
Gardaí are also reminding people they could still face prosecution for identifying the two boys.
A court order remains in place stopping anyone identifying them - including on social media.
Gardaí say a number of cases are already being considered by the Director of Public Prosecutions (DPP) for people who have broken it.