The arrest in Hamburg
German police arrested an 18-year-old man in Hamburg on Thursday after receiving a tip from the FBI, prosecutors said Friday, according to CBS News. He is accused of being the indirect perpetrator of murder and grievous bodily harm in the death of a 14-year-old girl from Indiana.
The FBI's Indianapolis office worked with the Fort Wayne Police Department to pass information to German police to help advance the arrest, said Special Agent in Charge Timothy J. O'Malley in a statement. Fort Wayne police said in their own statement that their Homicide Unit identified a suspect who contributed to the juvenile's death.
What prosecutors allege
According to the Hamburg public prosecutor's office, the suspect was 17 at the time of the alleged conduct. Between September and October, he allegedly "exerted influence" over the girl through the social network Discord. Prosecutors described her as "psychologically fragile."
Prosecutors allege he pressured the girl to cut herself and to write the letters "NMK" on a wall in her own blood. He also allegedly had her send him video recordings of these acts.
A few days later, prosecutors said, the girl hanged herself in her bedroom. The suspect allegedly sought a video recording of her death, hoping to gain status within the group or to secure entry into it.
The network behind the case
The Hamburg prosecutor's office linked the suspect to an online group called "Nefarious Maniac Kult," or "NMK." It is part of a global network known by the labels "764" or "COM."
The group 764 lacks a specific ideology, according to the source report, but its members openly encourage self-harm and violence. They also urge victims to produce videos documenting acts of self-harm or child sexual abuse material.
FBI Director Kash Patel has said the bureau saw a 300% increase in nihilistic violent extremism cases from September 2024 to September 2025, many of them involving 764.
What officials are saying
O'Malley framed the arrest as a message to anyone who exploits children online. "Anyone who targets or exploits a child should understand this: There is no safe haven from justice. It doesn't matter where you live or where you try to hide. The FBI will work with our partners around the world to find you and hold you accountable," he said.
The source material does not say whether the suspect has entered a plea, whether he has legal representation, or what the next steps in the German court process will be. The allegations are those of prosecutors, and the suspect has not been convicted.
