Title: Gotham by Gaslight
Content:  that Jacob Packer is the Ripper. Packer had been trained in medicine and law with the money of Thomas Wayne, but he was driven insane by Martha Wayne's rejection of his advances. Since then, he had been killing women who resembled Martha to silence the laughter of Martha he heard in his head. Packer reveals that he hired an assassin to kill Bruce's parents. Gordon appears at this time with the police and Batman tells them to arrest Packer. Packer confesses that he is the Ripper and tries to kill Batman, but Gordon shoots Packer dead at the last minute. Batman disappears into the shadows, leaving Gordon to take in the body of Jack the Ripper.
Title: Gotham by Gaslight
Content:  in prison, Gordon gives him all the documentation on the crimes. Bruce toils day and night to try to figure out how he can get the Ripper. Just one day before the execution, Bruce learns the identity of the Ripper by discovering he had the skill of a surgeon and used a knife that belonged to the medical group who worked with his father. Bruce escapes from prison with the help of Alfred and heads straight for the Ripper. Batman interrupts the Ripper as he is about to claim his next victim. Batman chases the Ripper throughout Gotham and the two eventually come to a stop at the grave of Thomas and Martha Wayne, where it is 
Title: Batman: Gotham by Gaslight
Content:  In Victorian-era Gotham City, Bruce Wayne is operating as the bat-garbed vigilante, the Batman, who is feared by the guilty and the innocent alike. One night, Batman saves a wealthy couple from being robbed by three orphans (Dickie, Jason and Timmy) and defeats their abusive handler, Big Bill Dust. At the same time, Ivy, an orphan turned exotic dancer and prostitute, becomes the newest victim of the serial killer called Jack the Ripper, who preys on Gotham's poor and destitute women. Citizens of Gotham believe the Batman and Jack to be the same man. Stage actress Selina Kyle, a protector of the women from "Skinner's End", 
Title: Gotham by Gaslight
Content:  Gotham by Gaslight is a DC Comics one-shot by Brian Augustyn and Mike Mignola, with inks by P. Craig Russell. The story revolves around a 19th-century version of Bruce Wayne making his debut as Batman just as Jack the Ripper has arrived in Gotham City. Gotham by Gaslight is considered to be the first Elseworlds story in which DC Comics characters from alternate timelines or realities are featured in stories outside of the DC Universe canon. At the time the story was first published, the Elseworlds concept had not been established yet and initial printings were not labeled as such. Subsequent printings of Gotham by Gaslight, however, have incorporated the Elseworlds logo. It spawned one sequel, Batman: Master of the Future (1991), also written by Augustyn, with art by Eduardo Barreto.
Title: Batman: Gotham by Gaslight
Content:  Gotham Police Commissioner James Gordon and Chief of Police Harvey "Bulldog" Bullock for their failure to stop the Ripper murders. Later that night, Selina acts as bait for the Ripper. It works, but the Ripper gets the upper hand during their fight until the arrival of Batman. After escaping, Batman asks Gordon to help him bring the Ripper down. At the Monarch Theatre with his friend Harvey Dent, Bruce meets Selina and the two bond at the Dionysus Club. Bruce realizes that not only were the two of them taken in by Sister Leslie, but that some of the murdered girls were orphans formerly under Leslie's 
Title: Batman: Gotham by Gaslight
Content:  the Ripper attacks Strange and throws him to his own patients, who tear him apart. Batman chases the Ripper on top of an airship in a fight that leaves Batman wounded as the airship explodes and the Ripper escapes. Batman is chased by police, only to be saved by Selina when he is nearly cornered. After seeing Batman is Bruce, she takes him to her home, where they spend the night. After the death of Marlene is discovered, Bruce is arrested, and Dent, jealous of Selina's affection, prosecutes him as the Ripper. Sentenced to Blackgate Penitentiary following the trial, Bruce is met by Selina, who 
Title: Gotham by Gaslight
Content:  Batman: Gotham by Gaslight is an animated loose adaptation released in 2018. It features Bruce Greenwood as Batman and Jennifer Carpenter as Selina Kyle. The adaptation differs significantly from the original comic, and includes elements from both books.
Title: Batman: Gotham by Gaslight
Content:  Bruce realizes that the Ripper will target Leslie and rushes to save her, but is too late; the Ripper has already murdered her. At the crime scene, Bruce finds a bloody Dionysus Club pin, meaning the Ripper has to be one of Gotham's wealthy. At Sister Leslie's funeral, Bruce is met by Hugo Strange, claiming he knows the killer and wants to meet with Batman. Bruce also is met by Marlene, a drunken old woman who claims she saw him sneaking around when Sister Leslie was killed. Bruce's butler Alfred stops the three orphans from pick-pocketing him and offers to provide them work. At Arkham 
Title: Batman: Gotham by Gaslight
Content:  Producer Bruce Timm has pointed to the 1944 film The Lodger and Erik Larson's book The Devil in the White City as influences on the film. He also cited a dream sequence in a particular episode of the 1960s television show Gilligan's Island in which the characters of the show took on well-known roles from Victorian-era British fiction. "There was a Victorian one where the Professor was Sherlock Holmes and Skipper was Doctor Watson and Mary Anne was Eliza Doolittle and Gilligan himself was Jekyll and Hyde. So, this is kind of the same kind of idea. You take those characters that you know and you put them in 
Title: Alternative versions of Joker
Content:  The Joker cameos in Gotham by Gaslight as a serial killer who, having married and poisoned at least 10 women, tries to commit suicide with strychnine when he is caught, leaving him with a permanent grin.

Question: whos jack the ripper in gotham by gaslight?
Answer: Jacob Packer.