In such a crucial period, even a small mistake could lead to someone being removed from their position, let alone serious matters like abuse of power. That aside, there had been incidents of Sable Emblem and the Unicorn Society attacking Scarlet Star that caused chaos within the city. Therefore, Harriett's position as a garrison instructor was on the line.
This was the most concerning issue for all officials in Sandstone after learning that Harriett was undergoing questioning by the higher-ups.