acid attacks
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.
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"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.'