Palloma Lima, 18, died after what cops said was a game of Russian roulette.

The white Fiat Palio car she is said to have been shot in during the deadly game had several bloodstains in it when it was stopped by police in the nearby area of Santa Maria.

The driver reportedly told cops he was planning to help Palloma's unnamed 27-year-old boyfriend go on the run by dropping him off at a safe haven after they fled Gama Regional Hospital.

Another couple said to have witnessed the killing have also been questioned by police.

Police told local media they suspected Palloma had died during a game of Russian roulette, in which players risk their lives with a revolver with a single bullet by taking turns to put the muzzle against their heads and pull the trigger.