Arrest and charges

Police in Hamburg arrested an 18-year-old German man on Thursday, 22 October 2026, and searched his flat, prosecutors said in a statement on Friday, 23 October. He is strongly suspected of murder and grievous bodily harm, both in what German law calls indirect perpetration, meaning carried out through another person. According to Tagesspiegel he was remanded in pre-trial custody. He has no previous convictions, the investigation continues, and the presumption of innocence applies. Prosecutors also suspect him of attempted coercion and possessing youth pornographic material, and a second attempted-coercion case has been joined to the new proceedings.

What investigators say happened

Investigators say that between September and October 2026 the suspect, then 17, contacted a 14-year-old girl from Indiana, mainly over Discord, and described her as psychologically fragile. He allegedly pressed her to injure herself severely and to film it, and she allegedly sent the recordings as he demanded. Using blood from her wounds, she allegedly wrote his pseudonym 'Kaz' and the group name 'NMK' on a wall. She died in her bedroom on 2 October, and investigators are still checking whether she recorded her death. After she died, he allegedly tried to obtain such footage and threatened people close to her with publishing personal data and compromising material if he did not get it.

The NMK network and the US tip-off

Prosecutors believe he wanted to make himself known within NMK, short for 'Nefarious Maniac Kult', or to gain access to the group through the material. NMK takes its cue from groups in the COM network, which includes the group '764' known from the White Tiger case. Within such communities, particularly vulnerable people are allegedly made emotionally dependent through social media so that the bond can later be exploited. The Hamburg investigation began with information from the United States, where the FBI and the National Center for Missing and Exploited Children passed on findings on 15 and 16 October. Earlier the same Friday, the federal prosecutor in Karlsruhe asked for a separate 17-year-old alleged NMK member, arrested in October 2025, to be tried, saying he is accused of incitement in at least 14 cases involving minors aged 12 to 16.

A parallel to the White Tiger case

Die Welt reports that a German-Iranian man has been on trial since January before the Hamburg regional court in the White Tiger case, accused of 204 offences committed between 2021 and 2023. That case includes allegations that he drove a 13-year-old American to suicide online, and the trial is being held without public access. He was arrested in Hamburg in June 2025, and the Hamburg prosecutor's office has charged him with murder among other offences. NDR notes that this is already the third case the Hamburg prosecutor's office has handled in which minors were pushed into serious self-harm through video chats. Investigators are still examining whether the girl recorded her death, and the investigation against the 18-year-old suspect continues.