According to a psychiatric assessment, the Würzburg knife stabber was innocent of guilt when he attacked passers-by at the end of June.
The two experts commissioned in the investigation would each come to this conclusion independently of one another, the Bavarian State Criminal Police Office and the Munich Public Prosecutor's Office announced on Friday in Munich.
However, it is still unclear what exactly drove the Somali to the attack on people who were obviously unknown to him.
There are still no indications of confidantes or accomplices or an extremist background, the investigators said.
With the new expert opinion, there is now much to suggest that there will be a so-called security procedure against the 32-year-old - probably before the Würzburg district court.
Such proceedings involve placing a suspect in a psychiatric ward.
The public prosecutor's office does not write an indictment like in normal criminal proceedings, but a petition.
The accused remains the accused and does not become the accused.
Nevertheless, there is a hearing in court - in this case probably before a jury chamber.
It has been proven that the migrant stabbed people who were obviously unknown to him on June 25th in the Mainstadt.
Three women died and five people were critically injured.
There were also four slightly injured.
The investigators had already announced on July 20, based on an initial psychiatric report, that the man was possibly incapable of guilt at the time of the crime.