Xu Mo received feedback from the Mystic God Temple and found out that Alon was indeed a traitor, a high-ranking undercover agent for the Church, who had been laying out plans for many years.
Vera also realized that on the day Lonco died, Alon inadvertently guided them to that area, though it was quite secretive. If it hadn't been discovered, they would never have suspected Alon.
As for the killer of Lonco, Alon was unaware. He was only responsible for his own matters, while another person was responsible for killing Lonco.
Since it has been confirmed that Alon is with the Church, certain things can be ascertained. It is highly likely that during that trip to the Duffy Family, Saint Heir Naga instructed Duffy.
However, this matter should be extremely secretive, perhaps only Saint Heir Naga and Duffy know, along with some higher-ups. Regardless of whether it is Duffy or Naga, they are not within Xu Mo's control. Therefore, trying to find out who killed Lonco is almost impossible.
