DeKok and the Geese of Death Book

Interesting mystery. Inspector DeKok is called to investigate a woman's claims that her life has been threatened. It is in another precinct and he is not happy about going. He has the woman's geese trying to attack him when he first arrives and later on they are poisoned and he is called to investigate. He is worried about a suspected murderer who has escaped police custody and doesn't want to bother with this old woman and her geese.
The woman's gardener is then murdered so DeKok and his partner starts investigating that. The woman's family is called and come to stay with her and they are rather unsavory. The members of the family start being murdered and DeKok is quite puzzled. Eventually he figures things out and his escaped suspect is also involved.