A 24-year-old man was caught trading weapons from within the psychiatric prison in Heiloo. He was arrested last week. The man, Herman D. from Ermelo, had three cellphones and a laptop with him from which he ran his business, the Telegraaf reports.
The laptop and phones were found in the suspect's room in Heiloo, sources told the newspaper. In 2017, D. was sentenced to a short prison sentence and institutionalized psychiatric treatment, because he stabbed three men in Nieuw-Vennep, the man's lawyer confirmed to the newspaper.