"In this case, the details were there already, so it was a little more simple."
Tod had "access to" a victim aged less than 6 - who was not a direct family member, Skrabek said.
"There was more of an urgency to get the warrant for him just because of the threat of a child's safety."
Tod could have had access to other children and it was possible "that this wasn't an isolated incident," Skrabek said.
"So that's what [the police] have to continue looking into."
He'd be charged with sexual assault, sexual interference, possession of child pornography and making and distributing child pornography.
Police were yet to rule out laying further charges because the investigation was ongoing.
Staff would seize the computer equipment Tod had access to and search it for more evidence and child porn images, Skrabek said.
The Herald has contacted the New Zealand police for comment.