The episode exemplifies how Monster uncovers its mystery in a reverse chronological fashion, dropping clues about Johan’s past through the lens of his current victims.
Richard realizes that several seemingly unrelated deaths over the past four years are actually linked. He concludes they were orchestrated to systematically isolate Schuwald from everyone he trusts, leaving only one person by his side: Johan. Monster Episode 28
For further details on the characters or the series’ overarching philosophy, you can visit the official Naoki Urasawa's Monster Wiki . The episode exemplifies how Monster uncovers its mystery