At the end of the same year, the colonial authorities launched an island-wide roundup of activists in the petition campaign (including Chiang) and accused them of violating the “ Social Order and Police Law. ” This incident rocked the island.
同年底，蔣渭水等議會請願同志突然被總督府以違反「治安警察法」為由，對會員展開全島性檢舉，這就是轟動一時的「治警事件」。