The first time he killed someone, he took the lives of fourteen people, yet Zhang Menglong didn't bear much psychological burden. After all, those people were originally there to kill him. Without Ye Yin's intervention, he, Lu Yiyao, and Wang Ling would have all died there, unnoticed by anyone.
Such an action would be considered excessive self-defense at most, and nobody was going to pursue legal actions against him. Moreover, with those fourteen people dead, nobody knew exactly how they died. Even if some traced the suspicion back to Zhang Menglong, knowing about Ye Yin's existence, aside from Wang Ling and the others, all the rest were dead. It would be beyond them to guess that Zhang Menglong had such an expert like Ye Yin protecting him.
