The perpetrator is also suspected of posting porn through letterboxes in the middle of the night.
A three-year-old boy was left with serious burns to his face and arm.
His three-year-old son suffered burns to his arm and face.
Everything you need to know as fresh restrictions commence.
"We have not tested on animals and we do not intend to do so".
Five others have already appeared in court, including victim's father.
The 41-year-old was detained on suspicion of conspiracy to commit grievous bodily harm.
Mark van Dongen died at a euthanasia clinic after the attack.
This is the capital's third 'noxious substance' attack in a week.
'Deserves the death penalty.'