They kinda did. The dudes were taken in as part of an ongoing investigation but were then released.

ctvnews.ca/…/outcry-over-french-streamers-death-o…

The investigation, opened in December, is looking into “deliberate violence against vulnerable persons” and “spreading recordings of images related to offences involving deliberate violations of physical integrity,” Martinelli’s statement said. It did not specify why Pormanove could be considered vulnerable.

The statement said two co-streamers allegedly involved in the case were briefly taken into custody in January but were released pending further investigation.

In parallel, the Nice prosecutor said, investigators interviewed Pormanove and one of his co-streamers who both appeared to be victims of violence and humiliation. They “strongly denied being victims of violence, stating that the events were staged in order to `generate a buzz’ and make money.”