The secure, partly forensic clinics at the Willem Arntsz Hoeve in Den Dolder have room for 135 patients. They stay in one of the three clinics. They have a psychiatric disorder and some of them have been convicted or have been in trouble with the law. Fivoor rents the buildings from Altrecht. The care institution in Den Dolder became nationally known a few years ago. Michael P., the murderer of Anne Faber, was treated in one of the clinics.