The trial of three Swiss youths, charged with randomly attacking passers-by while on a school trip to Germany last year, has begun in Munich.
The three known only as Mike, Ivan and Benji were aged 16 and therefore minors at the time of the alleged offences so the trial is being held in camera.
They now have to answer charges of attempted murder and intent to inflict grievous bodily harm on five people and face up to ten years in prison.
Only their parents and legal representatives will be in court for the proceedings which are expected to last seven days.
The case caused a German media sensation last year and much public debate about why such senseless violence occurs and who is to blame.
The boys were staying at a Munich youth hostel last summer where they reportedly changed out of their bloodstained clothes after the alleged assaults.
A reconstruction of the events implied that the teenagers had been drinking and taking marijuana prior to the attacks. One is supposed to have explained “they just wanted to have a little fun.”