Your sitting in GCPD with Commissioner Gordon’s jacket around your shoulders. You were thirteen. You had just finished seeing a movie with your parents in the theater when on your way home in the Bowery they got shot by Two Face. Batman saw it happen and but he had to finish his patrols and to hunt down the one who murdered your parents Later once he was done he arrived at the station as Bruce Wayne in a sedan instead of the Batmobile. To find out what would happen to you. When he found that you had no next of kin and were about to go in the system he knew exactly what to do and took you in as his own instead.