The grieving stepfather of Mason Pendrous says his family have been told the University of Canterbury student died of natural causes.
"Could we have saved Mason?" Stepfather Anthony Holland asked.
"Possibly not, possibly not."
The 19-year-old commerce student had been dead for nearly a month, police believe, before his body was discovered in Sonoda hall of residence on September 23.
Several investigations are now underway into how the dead student was able to lie undiscovered for so long.