[4][6] In April 1943,[7] Jacques Grippa put Fraiteur in charge of killing the journalist and art critic Paul Colin,[8] a well-known collaborator in the press, editor in chief of the weekly Cassandre,[9] and of the daily Le Nouveau Journal, which he had founded in 1940.

[10] On 13 April, accompanied by two other members of the resistance, André Bertulot and Maurice Raskin,[4] Fraiteur shot multiple bullets at Paul Colin as well as at his bodyguard in a library at 87 Rue de la Montagne in Brussels,[11][9] which was located under the offices of Nouveau Journal and Cassandre.

The Feldgendarmerie, the Geheime Feldpolizei and the Gestapo came to the crime scene and detained André Bertulot and Maurice Raskin: the Belgian police and justice were taken off the case.

Arnaud Fraiteur was quickly identified due to the license plate on the bicycle that he had left at the crime scene,[9] and the family home was placed under surveillance on the same evening.

[4] After being interrogated, and tortured, Fraiteur, Raskin and Bertulot were sentenced to death by the Oberfeldkommandantur's military court in Brussels after a show trial that was supposed to serve as an example to the Belgian population.