A 26-year-old man is found dead in a nature reserve and five youths between the ages of 15 and 18 are suspected of murdering him. It is unusual that it is such young people who are suspects, and who also have no previous history of having committed crimes, other than an assault conviction. And the case stands out in several ways, says Dennis Martinsson, senior lecturer in jurisprudence at Stockholm University.

The fact that it is a 15-year-old girl who is suspected of murder is very unusual.

"When young people are suspected of murder, it's usually young men. At the same time, we have recently seen high-profile cases where young women have been convicted of murder. I am thinking, for example, of the Vetlanda case," says Dennis Martinsson.

Even the crime scene stands out: A desolate nature reserve.

"The location is very unusual for a murder of this type. It may be a desolate place, but it also requires getting there and from there. It may not be a place you know if you are not interested in bird watching, or live nearby.

Hear the legal expert about what makes the murder case in Hjälstaviken unique in the video above.