Three people have been arrested on suspicion of murder. Two others have been released without charge.
The third person is still being questioned by the police. The fourth person has been released with no further action to be taken against him or her. The case is being investigated by the Swedish National Court of Justice. The trial is expected to last until the end of the month, when it will be heard by a panel of three judges, one of whom will be the judge who made the decision to release the other two.