After collecting clues, the Police officer assured Lemaire that they would identify the culprit as soon as possible, and left two officers to protect the Tax Office.
Lemaire had originally planned for his subordinates to familiarize themselves with the business by visiting markets or factories, but after several attacks, he had no choice but to order everyone not to leave Police Headquarters during work and to travel home in groups of three.
Despite these precautions, over the following period, members of the Tax Office still suffered attacks, with over a dozen hoodlums hurling stones and incendiaries at Police Headquarters, only dispersing after the stationed police fired their guns.
The subsequent investigation concluded that the attackers of the Tax Office were unlikely to be gang members and that they operated covertly, seemingly with professional prowess.