On Tuesday, police shot dead a 17-year-old who failed to stop for a traffic check.
The teenager, named Nahel M, was shot at point-blank range as he drove off and crashed soon afterwards.
According to French media, police initially suggested the teen drove his car towards them with the intention of hurting them. But footage you can see above - which was verified by the AFP news agency - shows an officer pointing his weapon at the driver through his window and appearing to fire at point-blank range.
The agency also reports that a person in the video can be heard saying: "You're going to be shot in the head" - but it is unclear who says it.
Since the death of Nahel, hundreds have taken to the streets across France.