Swiss Blaze Investigation Unfolds
Prosecutors investigate 2022 New Year blaze killing 41 in Swiss bar.
Sparklers ignited foam in Constellation bar basement.
Nine people, including Morettis, under investigation.
Official will answer questions after accessing case file.
Hearing lasted 15-20 minutes due to refusal to cooperate.
Mayor Nicolas Feraud faces questioning over missing safety checks.
Lawyer claims defendant exercised right to silence.
2 days ago