RCMP say the death of Warren Welters is being classified as a homicide and a pathologist was preparing to conduct an autopsy on Wednesday to try to learn more.
Officers say they have done several interviews, including with the people who found the body on Sunday, but no arrests have been made.
Welters, who was 51, leaves behind two adult daughters and an older brother.
For several years he worked as a first-aid attendant at the city's Prospera Place arena, assisting people at concerts and hockey games.
Becky Secord, who worked with Welters for two years, remembers him as a "kind gentleman" and says she cried when she heard he had been killed.
"I felt very highly of Warren. He was a good person. It hit me hard," she said.
"I can't imagine how (his daughters) would feel knowing their dad was murdered. That has to be very difficult."
Investigators initially deemed the death suspicious, but say they reclassified the case as a murder once they learned the cause of death, which they're not revealing.
Secord says she doesn't know how Welters died and wants to respect the family's privacy.
She keeps in touch with his daughter, Ashley, who worked with her at Prospera Place and now lives in Alberta.
RCMP are asking people with information about the case to call police. (Kelowna Daily Courier)