Hamburg teen detained over online pressure on Indiana girl

German authorities detained an 18-year-old in Hamburg on Thursday following an FBI tip.

The Hamburg public prosecutor's office announced the arrest on Friday. The suspect faces charges of indirect murder and grievous bodily harm.

He is linked to an online group called the Nefarious Maniac Kult, or NMK. This group operates within a larger network known as COM.

Prosecutors allege the suspect, then 17, used Discord to exert influence over a girl from Indiana between September and October. They described her as psychologically fragile.

He allegedly pressured her to cut herself and write NMK on a wall in her own blood. She sent him video recordings of these acts. A few days later, she hanged herself in her bedroom.

The suspect reportedly sought a video of her death. Prosecutors said he hoped the clip would boost his standing or help him gain entry to the group.

FBI Indianapolis Special Agent in Charge Timothy J. O'Malley said his office worked with the Fort Wayne Police Department to provide information for the arrest. The Fort Wayne Homicide Unit identified the suspect as a contributor to the juvenile's death.

O'Malley stated, "Anyone who targets or exploits a child should understand this: There is no safe haven from justice." He added that the FBI would work with global partners to hold suspects accountable.

The case coincides with a rise in nihilistic violent extremism. FBI Director Kash Patel reported a 300% increase in such cases from September 2024 to September 2025. Many involved the group known as 764, which encourages self-harm and violence without a specific ideology.