The Ghost of Jill the Ripper

Mysterious Britain and Ireland has an article on the ghost of Mary Pearcey, who is infamous as the hypothetical "Jill the Ripper". But why does her ghost haunt Whitechapel when she lived and committed her crime in Kentish Town up near Highgate? In the realm of paranormal theory, could the (imagined) connection of her to the Jack the Ripper ordeal have somehow "created" a ghost of her in Whitechapel? Or is it all just an urban legend?