Police Act Article 14

In the event that criminal investigation police are found to have failed to perform their duties mandated by prosecutors, their supervisors shall be reported by the prosecutors and punished according to applicable laws.
中文原文 警察法第14條
刑事警察受檢察官之命執行職務時,如有廢弛職務情事,其主管長官應接受檢察官之提請依法予以懲處。

English translation for reference only; the Chinese text prevails. Not legal advice.