Reference

I'm unable to find any details specifically explaining why lawyer Willem Anker dropped Willem van Eijk as a client. Willem van Eijk, known as "The Beast of Harkstede," is a notorious Dutch serial killer, and information about him is widely available, but detailed specifics about his legal representation are not in the search results.

For more comprehensive information, you might want to look into more detailed articles or books about the legal aspects of Willem van Eijk's cases or deeper interviews with the involved parties. Here are references to some general information sources where you could continue your investigation:

1. Wikipedia on Willem van Eijk
2. Murderpedia on Willem van Eijk

If you have more specific questions or need details on a particular aspect, feel free to ask!