While Andrew and the others discussed the captured spies and how they would act towards their employers, Vala led Shadow's agents to the location of the group to which the two men Andrew had defeated belonged.
Just as Oliver had told them, there were about 30 people and none of them seemed powerful. Vala and the Shadow's agents watched them from the shadows for a while, so as not to make mistakes due to any wrong information.
Fortunately, the information they had obtained from the interrogations was correct. There was no expert or powerful being with the group, at least not more powerful than Vala.
In fact, they seemed like a pretty weak group, since the strongest was the leader and he was only stronger than a common soldier. Besides, he was drunk as were most of his subordinates, so it would be an easy mission.
After observing enough, Vala informed the other agents, "Eliminate everyone except the leader," and the Shadow's agents immediately began moving.