This student, using the alias Hideki Ryuga (the name of a famous pop idol), reveals himself to be L. By doing this, L creates a "checkmate" scenario: if Light kills him now, it proves Light is Kira, as only Kira would have a motive to kill someone who just identified themselves as L. Key Highlights
: "He’s good. If I kill him now, it’s a death sentence for me." Death Note (Dub) Episode 9
: L gambles his life to gain proximity to his lead suspect. This student, using the alias Hideki Ryuga (the
A to see how Light reacts to this encounter. it proves Light is Kira