Is Line of Fire coming back?

When a U.S. Marshal falls in the line of duty, a seemingly cut-and-dry case turns into a deadly conspiracy as a family of law enforcement agents become the target of a mysterious assassin. Bridging personal differences and crossing professional boundaries, the Thornhill family must use the expertise from a lifetime of protecting civilians and politicians to protect one another and bring the killer to justice... even if it means betraying their sworn code.