Via the surveillance cameras at the company where those involved worked, it is possible to follow the development during the evening of May 12. A fight led to a man in his 30s being stabbed to death and another in his 35s being seriously injured.
Now the trial begins against the 42-year-old man charged with the crimes.
He himself admits that he dealt the fatal blows, but believes that it was in self-defense when he was attacked by the two men.
See the sequence of events in the feature above.