Key legal question
Whether the new letter was an 'important' new piece of evidence requiring reopening under Art. 385 StGB.
Extracted holding
The letter was new, but not sufficiently decisive: it did not undermine the factual basis of the original judgment or make an acquittal or substantially lighter sentence probable.
Extracted reasoning
The prior judgment already recognized a violent environment and the victim's violence. The letter added only possible motives and background, but nothing about the concrete shooting circumstances; it could not support self-defense or necessity.