For anyone wondering about verification:
The alt-text of the image is "Gewalt gegen Polizei | 
KI-generiert: ChatGPT" ("Violence against police | AI-generated: ChatGPT").
So technically they admit it, but not in a way a normal user gets to see.
I archived the page of the article at https://archive.ph/aD53r for further independent verification in case the GdP removes this.