The first findings about the knife attack in the ICE Passau-Hamburg are available, the alleged perpetrator is housed in a psychiatric clinic.

The investigation into the exact background of the crime can take weeks or months.

"What is happening now: thorough police and investigative work," said a spokeswoman for the Nuremberg-Fürth public prosecutor's office on Monday.

One now has to further evaluate the searches and interrogations after the fact.

“It was remarkable what came together within 24 hours,” she said.

The investigators had searched apartments in Passau, in Marl in North Rhine-Westphalia and in the Thuringian Unstrut-Hainich district.

In Marl it was about the family environment, in Thuringia about the closer circle of friends.

Three apartments in Passau were searched: that of the accused and two friends.

A cell phone and documents in paper and electronic form had been secured in the man's apartment, said the prosecutor's spokeswoman.

The investigators still have no evidence that the 27-year-old Syrian had confidants, accomplices or accomplices.

So far, they also have no evidence of a terrorist or Islamist background.

"Connection facts" for the reviewer

The alleged perpetrator lived in a student dormitory.

But he's not a student.

The investigators initially did not provide any information about why he still lived in the dormitory.

The day before the crime, he had lost his job.

The investigators did not say where he had worked or why he was losing the job.

The man is said to have stabbed four men between the ages of 26 and 60 in the ICE on Saturday morning.

Two of them were still in the hospital on Monday.

The investigations also served to create "connecting facts" for the expert with which he could get a final picture of the psychological state of the 27-year-old, said the spokeswoman. In a preliminary assessment, he came to the conclusion that the man suffers from "paranoid schizophrenia", he has delusional ideas and that his guilt was suspended at the time of the crime. However, there is no evidence that he had been treated for mental health problems.

The man had told the appraiser that he had been persecuted by the police for some time - which, according to the investigators, has no real background whatsoever.

According to police on Sunday, there is no evidence that he planned or prepared the act.

After his arrest, however, he is said to have said that he had carried the knife with him for a long time because he felt he was being followed.

Defense attorney: Accurate psychiatric diagnostics are important

The defender of the accused, the Nuremberg lawyer Maximilian Bär, also considers a precise psychiatric diagnosis to be important in the proceedings against his client.

"It is precisely not intended to create the impression - not even in the interests of the defense - that an incapacity to be guilty is recklessly assumed," he said.

It is therefore important to him to gain security in the question of whether or not he is guilty of guilt.

A detailed report by the expert is one of the points that is most relevant in such a procedure, said the lawyer.

He praised the way the investigating authorities have dealt with the case so far as "exemplary", and the press conference on Sunday as "fair and appropriate".

An unbelievable number of investigation results had been produced within a short period of time.

If the expert's first assessment of incapacity remained, no charges could be brought, because this would require a culpable suspect.

Instead, as is likely in the case of the knife attacker from Würzburg, there could be a so-called security procedure.

Such proceedings involve the permanent placement of an accused in a psychiatric hospital.

The public prosecutor's office does not write an indictment like in normal criminal proceedings, but a petition.

However, the investigators had already emphasized on Sunday that, in addition to the possible psychological motive, other motives should also be kept in focus.