This American version is adapted from a 2006 British television movie of the same name. Low Winter Sun (2006) also starred Mark Strong as Detective Frank Agnew.
During the series whenever a character mentions preferring 'American' or 'Lafayette' Coneys they are referring to a kind of all beef hot dog topped with meat chili, white onions and yellow mustard which local to Detroit and has its origins there.
Garrity Rights protect public employees from being compelled to incriminate themselves during investigatory interviews conducted by their employers.