Treacherous Dune

Cases unlock in order, like levels. This is case 60 of 100.
Rally bivouac at Lake Retba (the Pink Lake), Senegal, 6:30 pm. On today's stage, at km 112, car 204, leader of the overall standings, rolled over after landing off a dune at 10:40 am.
French driver Mathis Garnier broke his collarbone and was taken to hospital in Dakar. His navigator came out with bruises. The front right wheel came off in midair: the suspension arm bolts were loose.
The car spent the night in the service park, fenced in and guarded at the entrance. Only team members moved around in there between dinner and the 7:00 am start.
Three people came near car 204 during those hours. One of them loosened those bolts.
The bivouac service tent, canvas flapping in the wind, the smell of grease and pink sand on the ground.
Suspects
Bertrand RocheChief mechanic of the car 204 team, 56
Aminata SowNavigator of car 204, 29
Joaquín FerreiraRival driver of car 211, 38
Case glossary
Words from this case you might not know.
- bivouac
- A temporary overnight camp; in rally raids, the camp where teams sleep and repair cars between stages.
- service park
- The fenced area at a rally where mechanics work on the cars between stages.
- suspension arm
- A metal link that connects a car's wheel to its frame and lets the wheel move up and down.