Did anyone notice that Jun-ho didn't find the "zombie player" file because it really was his brother.

Go back to episode 5 of season 1. Jun-ho subdues the soldier and wants him to tell him what happened to the person who had only one kidney and who the soldier beat with an iron bar and called a zombie, because Jun-ho thinks it is his brother In-ho. Then the soldier nervously says that the person who only had one kidney was a woman and that they raped her and that Jun-ho can confirm this by looking at her records in the Frontman's room.

Jun-ho kills the idiot and goes to the leader's room where he finds the files of all the players from that year, including Gihun, but the detail is that he doesn't find the file of the player with only one kidney. So the story the soldier told about the kidneyless zombie was in retrospect, I mean he was remembering what happened in 2015 and the zombie was really In-ho? And the doctor who removed the kidneys already worked for them before entering the games and that's why he was so intimate and shameless when he spoke to the soldiers.