With a prominent mobster's trial starting in a few days, the DA has decided to gather the witnesses up and hide them to keep anyone from getting to them.
A well known mobster shot someone down in the street a couple a days ago. You've got to hit the street find out where he went, and bring him to justice. This is for law enforcement characters.
The bosses nephew killed a man in the bar a few hours ago. It's your job to get him out of town and down to the bosses hunting cabin to lay low for awhile. This is a gangster character game.
The bosses nephew is in jail, and awaiting trial. It's your job to tighten the screws on the witnesses and get at least some of them to not testify. This is a gangster character adventure.