Sophie Quader's Killing

Wiesom Medonie and Sabrina Quader were sentenced to life imprisonment with a minimum of 30 years. The couple's case has since been labelled an example of Folia Du, a rare psychiatric syndrome where two individuals share an identical delusion. In this case, Sabrina created the delusions regarding Sophie and Mark and then transmitted them onto Wiesom. His love for Sabrina prevented him from viewing her behaviour critically and honestly. Instead, he let himself believe in her twisted reality and by doing so, enabled and emboldened her. Another example of the Folia Du phenomenon is the Ericsson twins, covered in Episode 17 of Case File.