Protecting Luchan City
The officer then went on to explain everything that had happened here within the last few days that were explained to him by the officer at the counter within the MBO tower.
Gustav already knew about the whole thing being a conspiracy and how they found one of the people who was most likely responsible who ended up committing suicide to cover up the deeds.
It was also known that there are others involved who are most likely infected people and controlling them as well.
What Gustav had no idea about was the situation of Gradier Xanatus and Red Shadow who had both jumped off the walls and headed towards Gildian City.
Gustav was a bit surprised that they would infiltrate the city on legs which meant they would have to go through thousands of infected.
This way was risky since they could get infected themselves.
"Oh so they also wanted to cut down the numbers of the infected in the process," Gustav figured out their motive.