The world of law is shocked by the death of their colleague Derk Wiersum (44) in Amsterdam, a man who in various reactions is mainly described as knowledgeable and friendly. The criminal lawyer who assists crown witness Nabil B. was shot Wednesday morning near his home by an unknown, young perpetrator.

Aimabel, sympathetic, good; that's how lawyers describe their liquidated colleague in a first reaction to his death. "But above all a husband and father," said fellow lawyer Bart Swier.

Wiersum studied Dutch law at the University of Groningen and was sworn in as a lawyer in 2003. In addition to having taken on many criminal cases since then, he was also a deputy judge at the Zeeland-West-Brabant court. "It is extremely sad," says a spokesperson for the court against Omroep Zeeland .

The Dutch Association of Criminal Law Attorneys also said that they had "taken note of horror" of the violent death of their colleague.

"We know him as a very pleasant person and a competent, honest criminal lawyer. Our thoughts are currently with his wife, his children and other relatives, who we wish all strength with this inconceivable loss," said chairman Jeroen Soeteman.

Mark Rutte calls it "very disturbing" what happened in the Amsterdam residential area, and refers further to the ongoing investigation.

The crime scene in the residential area. (Photo: Pro Shots)

Wiersum assisted crown witness Nabil B.

One of the best-known cases in Wiersum is that of crown witness Nabil B. The criminal has made several statements about the fugitive Ridouan Taghi, who is suspected of multiple liquidations.

He therefore argued for better protection for the family of B., certainly after the brother of the crown witness was liquidated in his office in Amsterdam. It is believed that this was executed as a "punishment" for B., as his brother was not in the criminal environment.

The death of Wiersum is therefore the second liquidation of a person close to B.. The police call it a "low point in the fight against crime".