When Lou Solverson (Patrick Wilson) gets out of his police car in front of the butcher shop, the Mike Zoss Pharmacy is seen across the street; this was also the name of the pharmacy where Chigurh blows up the car in No Country for Old Men (2007), noted in trivia for that film as a tribute to the Coen brothers' (Joel Coen & Ethan Coen) childhood hangout Mike Zoss Drugs, and also the namesake of their production company Mike Zoss Productions.
The campaign poster in the town has Bruce Campbell's face but he's uncredited. He was also uncredited in the movie version of Fargo (1996) playing a character in the soap opera that was usually playing on someone's TV.
The title probably comes from Franz Kafka's The Trial (1962), which included a parable called "Before the Law." The parable attempts to explain man's relationship with law and society in general.