The current owner is a lady married to a local politician. She inherited the farm 4 years ago from her aunt. She visited the property a few times and never noticed something suspicious. The rent was paid for promptly every month.
Many questions remain unanswered.
The 58 year old was an excellent carpenter, specialized in ship interiors. He did not live at the farm, but visited it daily with food and stuff such as toilet paper. Towards the outside world he was just refurbishing the old farm. Very weird story.
article in Dutch: https://www.rtvdrenthe.nl/nieuws/153066/Eigenaresse-boerderi...