One of the owners of a Swiss nightclub that burned down in a deadly New Years fire fled the venue without warning partygoers of the danger that was unfolding, prosecutors have said.
The inferno at Le Constellation bar in the Alpine ski resort of Crans Montana killed 41 people and injured another 115.
The fire is believed to have been caused as staff waved champagne bottles plugged with sparklers close to the ceiling.
Investigators believe it then rapidly developed into a 'flashover' - likely igniting much of the venue in seconds and rendering escape almost impossible.
Swiss prosecutors showed security footage taken inside the venue to lawyers representing the families of the victims earlier this week, The Times reports.
Fabrizio Ventimiglia, representing 16-year-old Italian survivor Sofia Donadio, said a video showed Jessica Moretti, who owned the bar with her husband, running up the stairs to the exit after she spotted the fire.
'What makes me angry is she does not help anyone and does not stop anyone entering -- she doesn't say anything, and I believe she had a moral, ethical and legal obligation to do so,' said Mr Ventimiglia.
Mrs Moretti told prosecutors she 'panicked' when she saw the flames and left the bar to call the fire brigade, adding that her intention was to come back when the venue had been evacuated.
Mr Ventimiglia asked: 'Why didn't she block people who continued to enter? That's serious.'
The lawyer added that footage showed Mrs Moretti and her staff inserting the sparklers in champagne bottles before she lit the sparkler she was carrying.
'She is obviously the boss and so it's logical to assume she was deciding everything,' he said.
Mrs Moretti said that one of the security guard's she had hired, Stefan Ivanovic, knew where the fire extinguishers were.
But Mr Ventimiglia said video appeared to show the security guard and the bar's DJ - both who were victims of the fire - searching for the extinguishers.
'At first they can't find them, then the DJ finds one but it's too late,' he said.
Mrs Moretti and her husband Jacques are under criminal investigation, facing charges of manslaughter by negligence, bodily harm by negligence, and arson by negligence.
They face up to 20 years in prison if charged and found guilty of manslaughter.
Investigators believe that sparkling candles ignited the fire when they came too close to the ceiling, which was outfitted with soundproofing material.
Local authorities have said that fire safety inspections of the bar hadn't been carried out since 2019.
With high-altitude ski runs rising around 3,000 meters (nearly 9,850 feet) in the heart of the Valais region, Crans-Montana is a major destination for international alpine skiing competitions.