Der letzte Bulle S04E02 - Nagel ins Herz

Three fully loaded delivery vehicles are stolen. During his investigation, detective Jan Schreck is killed: an unknown perpetrator drives a nine-centimeter nail into the private investigator's heart—using a pneumatic nail gun. The murder weapon is found on board one of the stolen vehicles, and the parcel thief and the private investigator's killer could be one and the same person. But is the cruel deed really the work of the merciful Ulrich Huberty?