Four months after the deadly collision between two S-Bahn trains in Schäftlarn near Munich, there are increasing indications that one of the two train drivers made a mistake.

According to an interim report by the Federal Office for Railway Accident Investigation, the then fifty-four-year-old is said to have run over a stop signal in February and then overturned the automatic emergency braking.

The man, who was seriously injured himself, is being investigated for negligent homicide.

The “Spiegel” initially reported on the report by the federal authority.

When the two S-Bahn trains collided on the single-track line south of Munich on February 14, a twenty-four-year-old died and numerous people were injured, some seriously.

At the time, the emergency services had reported 18 injured people who had come to clinics.

The document from the federal agency even mentions ten seriously injured and 47 slightly injured.

However, the public prosecutor's office does not consider the report of the state accident investigators to be that relevant for the criminal assessment.

It was "just one piece of the puzzle among many," said senior public prosecutor Anne Leiding from the Munich I public prosecutor's office on Thursday about the document.

The investigation is ongoing, she stressed.

It is still unclear whether there will be any charges.

"A work mistake"

The Federal Office's paper states that, according to current knowledge, "a work error on the part of the train driver (...) was the primary cause of the train collision in Ebenhausen-Schäftlarn".

First the man drove past a stop signal and then behaved incorrectly: "After receiving an emergency brake from the local train control system (PZB), he did not observe the operational rules and continued the journey illegally in the direction of the single-track section in the direction of Baierbrunn .”

The authority refers to similar cases that have already existed, in particular an accident in August 2014 at Mannheim Central Station.

At that time there were four seriously injured and several slightly injured when a freight train and a passenger train collided.

The federal accident investigators conclude that the measures taken to date to prevent serious misconduct by railway staff made sense, but were not sufficient.

"It is recommended to develop or improve processes in the safety management system of the railways, with which the effectiveness of compliance with the rules can be effectively checked after a PZB emergency braking occurs." The vehicle technology should also be expanded so that engine drivers after such an emergency braking adequate time for reflection and action.

At the beginning of June there was another serious train accident in Garmisch-Partenkirchen in Bavaria.

A regional train to Munich had derailed there.

Five people died and nearly 70 were injured.

The route there has so far remained closed.