He was curious to see this girl and to hear her story and what it was that she was looking for in Kamu. Meanwhile, he told the sister that they had done something good to wait for his decision for the peace deal was on. Remember, it was not that this deal was done but he said this because he found the wizard absent and had to wait for him before doing anything.
In the days before, if someone was caught around the Kamu territories, they were to be sent to the gallows for execution without any trial. Since Martin wanted to show that they were in terms with Kang’ethe to his people, after this girl told him that she was only after an herb to save her mother, he ordered the girl to be sent to the dungeon for further investigation.