After the death of crime journalist/fighter Peter R. de Vries this week, one of his major interviews that is mentioned is several articles is the one he did with Charlie da Silva (former bodyguard of top criminal Klaas Bruinsma) who stated that he knew Mabel because of her relationship with Klaas Bruinsma (Mabel denies that they had a relationship). It was the first step in a media storm that led to Friso and Mabel not asking parliamentary permission for their marriage.
So, next to the appreciation that the royal family has for the important work he has done in many cases and the shock and unbelief about him being murdered (most likely caused by his involvement in the Netherlands' most severe criminal case), I am sure they haven't forgotten his role in this episode that changed the line of succession.
What about the reverse? With the royal family expressing condolences for Mr. de Vries's murder, has there been commentary on their attitude towards Klaas Bruinsma's links to Princess Mabel?