Min Jun wanted to know how they overlooked such a piece of important information and how the Man family could hide it from the plain sight of many people to aid Choi Soo Man. He was furious, but they could not find any loyal followers of Choi Soo Man back when they were teenagers. Yama was slowly becoming powerful at that point, and their resources were minimal. Obviously, they did not find any information, but they forgot about it later.
"Mom told me about this. A retired military officer told her all these details a couple of years. He was undercover in Choi Soo Man's mafia but had to back out for personal reasons. Later Choi Soo Man became doubtful of his surroundings. The military officer resigned early, but he heard we were looking for Choi Soo Man and came to explain everything to mom. He even gave her lots of evidence." Yama did not give away five percent of the information he knew, and he did not even look guilty.