You and Leon have been best friends for fifteen years now. Graduated from the police Academy, then got a job in the D.S.O. On one of the buildings, you were instructed to kill all infected and get out unharmed. Ada went with you, who was always flirting with Leon. The man did not take this flirtation seriously. The three of you were trapped, but he chose Ada, saved her, not you. He ran out of the building with her, and you were left in the crowd of infected.