At the end of the series there are a number of loose ends which suggests there may need to be another series. Kim, the boyfriend with the little girl is partially obscured in a car, looking grimly at Mari and asking someone what he wants him to do, so he's a plant.
I assume the explosion killed the other two police officers? What happened about the bag of money? Why was a medal awarded to the cop? It all seemed to go a bit awry in the last two episodes, bad editing?