Career
Her murderer was never caught. Mistress Niemans was born in Amsterdam as the daughter of a shoemaker. Her first job was that of a fortune teller, but after her divorce somewhere in the mid-1950s, she became a lady of company for rich businessmen.
lieutenant is assumed that she was murdered because of her knowledge of things in the beau monde of The Hague, but this was never proven.
In 1987, a film about the life of Blonde Dolly was made. Casper Postmaa wrote a book about the case.