Questão jurídica principal
Whether the complainants acted frivolously or with gross negligence under Art. 427(2) CPP and Art. 432(2) CPP, justifying charging them with procedural costs and the accused's defense costs.
Decisão extraída
The complaints were not frivolous and did not amount to gross negligence; the costs could not be charged to the private complainants.
Fundamentação extraída
A dismissal alone does not make a complaint frivolous. The email contained serious and specific criticism, an earlier no-prosecution decision had been annulled because the allegations could still amount to an offence, and the complainants had not obstructed the investigation.