was first introduced into the Batman universe in the No Man's Land (1999) comic book arc. Two-Face hires him to assassinate James Gordon. Cassandra spots him and saves Gordon's life. After she has burned Two-Face's money to void the contract and refuses to come back to him, Cain leaves Gotham, briefly tearful at hearing his daughter's first word ("Stop"). In Cassandra's Batgirl book, Cain is shown to be depressed and alcoholic, constantly rewatching old tapes of Cassandra's training. He later broadcasts a video into the Batcave that reveals what Cassandra had done years ago, but Batman continues to trust her when she deliberately charges towards an armed opponent to save an innocent man, explaining that her reason for doing so was instinct. Framing Bruce Wayne Lex Luthor hired Cain to frame Bruce Wayne for the murder of Vesper Fairchild, however Cain had an ulterior motive; determining whether or not Batman was worthy enough of raising Cassandra. Having realised that Bruce was Batman, Cain not only framed Bruce Wayne for Vesper's murder, but planted a complex sequence of evidence to suggest that Wayne killed her because she had deduced Batman's true identity, infiltrating the Batcave and doctoring and then erasing Vesper's electronic journal in such a manner that only the Bat-family could determine what he had done. Although Batman briefly flees with the intention of abandoning his life as Bruce Wayne, a series of events force him to recognise the importance of his civilian life, while Cassandra determines that Cain was responsible after examination of Vesper's corpse reveals that she was first immobilised with a nerve strike Cain taught her and Bruce. Luring Cain into a confrontation near the end of the story arc, Cain concludes that Batman is indeed worthy and turns himself in to clear Wayne's name. Luthor hires Deadshot to kill Cain while he is in jail due to a fear of him implicating Luthor in Fairchild's murder. Cain has a death wish and almost allows himself to be killed before being reminded of Cassandra. He then fights back and shoots Deadshot repeatedly, intentionally leaving him alive to prove a point. Cassandra visits Cain while in jail and attacks him, threatening to kill him if he ever commits another murder. Cain was proud of this and told Cassandra the date of her birthday and said that "My little girl... all grown up". Later, he escaped from prison undetected