Emile Dorian was a rogue geneticist.
History[]
Dorian was a former geneticist in Gotham City where he was Kirk Langstrom's partner. Upon creating the T-99 mutagen, Dorian turned to unethical activiites. He was quickly found out and was forced to leave Gotham. He had decided to move out to an uninhabited island, where he had continued his experiments. He had managed to create Garth, a genetically-altered gorilla and later Tygrus, a human-tiger hybrid, with cunning and strength augmented attributes, who he had described as the pinnacle of his art.
Dorian had decided that, he should find or create a partner for Tygrus. He chose Selina Kyle as Tygrus' new mate and sent Garth to kidnap her. Garth took her to the island and Dorian had subjected her to splicing. As a result, Catwoman was transformed into a human-cat hybrid. But Batman had investigated Catwoman's disappearance and tracked her to Dorian's island.
Upon arriving, Batman had witnessed Catwoman's new form and had attempted to save her, but Dorian sent Tygrus to kill him. Tygrus's intelligence had allowed him to understand the truth of the situationa and he had turned against his master. When the laboratory had exploded, Tygrus had saved Dorian and had delivered him to Batman and Catwoman. Dorian was presumably arrested, and sent to prison for his crimes of kidnapping and illegal experiments, particularly illegal human experiments.