Batman #1

Fifteen years ago, a young Bruce Wayne returns home with his parents after a night at the theatre. However, they are accosted by a mugger who demands they hand over his mother's necklace. When his father interferes, the mugger shoots both of Bruce's parents dead and flees the scene. Traumatized by the events, Bruce vows to avenge their deaths by dedicating his life to fighting crime. For years, Bruce trains his body to physical peak and studies various subjects, including martial arts and fields of sciences. In the present day, he decides to enact his crusade, though decides to don a disguise to strike fear into the hearts of criminals. At that moment, a bat flies through the window. Believing it to be an omen, Bruce decides to don the identity of "Batman", using his inherited wealth to fund his crusade.