On Tuesday 19 December, Rennes prosecutors announced that a police commissioner would stand trial in the criminal court (tribunal correctionnel) for “involuntary manslaughter”. Commissioner Chassaing was in charge of the controversial police operation on the night Steve Maïa Caniço drowned in the Loire at the 2019 Fête de la musique in Nantes.

In February 2022, Index had produced an independent expert video report commissioned by the investigating judge in charge of the case.