An asylum seeker with a residence permit is found dead in his home, murdered with ricin poison. The question for the team is whether the perpetrator should be sought in the asylum seekers' center where the victim was taking an integration course. The investigation then reveals that the man had a rather promiscuous lifestyle. Could it be that a jealous neighbor took revenge for an alleged affair? The investigation takes a different turn when it turns out that several people have been murdered with ricin after a date arranged through a dating site.
NPO 1