Zuo Daoxing arrived at the palace in half a moment.
"Your Majesty, there were a total of thirteen people who had contact with the Prince's sachet. Among them, three were palace maids from the Needlework Department who made the sachet, three were Imperial Physicians from the Imperial Medical Bureau, responsible for preparing the medicine for the Prince's sachet. The remaining ones were eunuchs and palace maids around the Crown Prince."
Kneeling halfway to the ground, with a serious expression, Zuo Daoxing said, "According to their confessions, they all seem to be innocent. I have been subjecting them to brutal torture, with the secret interrogation technique of my Xiuyiwei, I believe there will be results soon."
About these people, he had been questioning them a few days ago.
Although the situation with the 'black datura' hadn't been investigated at that time, it didn't prevent him from starting the investigation in advance.