The schoolgirl was originally born in Brazil, and moved to Austria with her parents in 2013. On Friday evening, she met with her 26-year-old friend, along with a 37-year-old man, in the apartment of the 26-year-old in the Jakomini district of Graz.
During the evening, the group partied with a powerful mixture of cocaine and Ecstasy. The two men left the apartment later that night, but returned on Saturday morning.
Early the next morning, the girl began to feel unwell. When the two men returned, they saw the deteriorating health of the girl, and called an ambulance.
By the time rescuers arrived, it was already too late. The emergency medial team took immediate first aid measures and attempted to resuscitate her, but were unsuccessful.
The girl died in the apartment from a combination of pulmonary edema and swelling of the brain, according to a medical examiner from the state criminal office.
Charges will be pending after a coroner's report is complete. None of the people involved had any criminal record from drug-related activities, according to the police.