There may be an honorable motive behind the act in the Lundby district of Gothenburg last Saturday, where a woman died after being hit by a car.
A man who was with her was injured and two young men are under arrest on suspicion of murder and attempted murder. Two more people are suspected of protecting a criminal.
There are close family ties between several of those involved, and the prosecutor confirms today that an honorable motive is being investigated.
Hear the prosecutor talk about the investigation, in the player above.