After the Mafia Boss had spilt the beans, a portal had opened up and he had been quickly yoinked away. The information he had given them was helpful, but it had not sufficed their coordinated city-wide attack.
Tsu and Kai, along with their little spies in training, had been gathering information on the fly, which had also been complemented by several Home Guards. They were keeping the reconnaissance and information gathering to only a handful of people mainly because Tsu was convinced that there were moles in the Police department too. It would take time to purge the moles within the police department and doing so before the raid might scare the other Mafia Bosses away.