After fatal knife wounds in Delmenhorst at the beginning of October, a suspected helper of the main perpetrator was released from custody.
The urgent suspicion against the 43-year-old was not confirmed, the police said on Tuesday.
But it will continue to be investigated against him.
Delmenhorst - A 34-year-old man from Iraq killed a 23-year-old man with knife wounds in Delmenhorst on October 3 and seriously injured a 27-year-old woman.
She died in hospital days later.
During the investigation, the 43-year-old man, who also comes from Iraq, was suspected of being a possible helper.
dpa