This type of crime carries with it a heavy sentence in my country. Sweden is likely similar. Have they been sentenced yet?
They have been sentenced to a few months in a juvenile detention facility, as they claimed that they were minors when the crime was perpetrated. There was no independent age verification, and their claims were accepted.
Europe is a very cultured and law abiding. They don't know how to behave with the natives. These migrants are used to in their home countries to live every day in extreme. So they Dodge. They just need to be shot like mad dogs.