Katherine Mielniczuk, 26, tragically died from opioid intoxication on Christmas Eve in 2023.
Cops initially said they did not believe the former chemistry student’s death was suspicious, but have now raised questions over whether there was ‘foul play’ involved.
Police in the city of Sloviansk have launched an ‘ongoing’ murder investigation – with fears Ms Mielniczuk could have been pumped with a fatal dose of drugs, the Mirror reports.
It comes as a coroner demanded to know if someone ‘administered something without her consent’ before colleagues discovered her lifeless body in her bed.
Ms Mielniczuk went to Ukraine after Russia’s full-scale invasion in 2022, compelled to use her medical skills to help those in need.
The University of Bristol graduate had been in the country for 18 months, primarily with the humanitarian group Stay Safe UA, and was attached to the 151st unit of the Special Operations Forces.
She also served as an instructor and combat medic with a group calling itself Menace Medics.
Hellbound and Down 