Beck 33 end of the road (2016)

Three brutal murders are committed in a house in a quiet suburb. The victims are a former police officer, his wife and their 10 year old son. The Beck group takes on the case and find that there is a hidden security room in the victims’ house, containing stolen weapons. They find fingerprints from a criminal who was involved in a robbery 4 years ago. After the robbery, he shot his accomplices and disappeared without a trace, along with their haul of 6.3 million. The question is how the former police officer ended up with the weapons and how is he connected to the thieves? The case wakes strong feelings at Police Headquarters and takes highest priority.