The trial of an Alpine climber accused of negligent manslaughter after his girlfriend froze to death on Austria’s highest mountain has begun in Innsbruck.

Prosecutors allege that Thomas Plamberger left his partner, Kerstin Gurtner, about 50 metres below the summit cross of Grossglockner at around 2.00 am on January 19 last year. Gurtner, 33, was reportedly suffering from exhaustion and disorientation in freezing conditions.

Prosecution cites multiple lapses

According to the Innsbruck public prosecutor’s office, temperatures were around –8°C, with strong winds making it feel close to –20°C. Plamberger allegedly descended to a mountain hut to seek help, returning more than six hours later to find her dead.

After an 11-month investigation, prosecutors charged him with negligent manslaughter, citing nine alleged mistakes. These include inadequate planning, failing to call for timely assistance and not responding to repeated police contact. Authorities argue that as the more experienced climber and organiser of the expedition, he bore responsibility for the safety of the ascent.

Defence calls it a tragic accident

Plamberger has denied wrongdoing. His lawyer maintains that the couple planned the climb together, were properly equipped and only encountered unexpected difficulty close to the summit. The defence disputes parts of the prosecution’s timeline and states that the decision to separate was made by mutual agreement in an attempt to secure help.

Grossglockner, standing at 3,798 metres, is considered one of the most challenging climbs in the Austrian Alps, particularly in winter conditions.

The court will now examine whether Plamberger’s actions amount to gross negligence under Austrian law. Meanwhile, tributes continue to pour in for Gurtner, remembered by family and friends as a cherished daughter and partner.