Hangdog Jack is one of the many criminals who operate under the authority of Lorcan Kell. Working in the slums of Parity Lake, he is responsible for keeping local merchants in line, running protection rackets, and sussing out suspected undercover officers. Jack earned his nickname after an incident where he strung up a recalcitrant merchant’s favorite dog by the neck, leaving it to die on a noose in full view of the public.
Hangdog Jack is the uncle (great-uncle, technically) of Solomon Foster. Solomon’s mother died when he was very young, and Jack adopted him and brought him into the gang rather than let him starve on the streets.