Sgt. Sheryl Armstrong says Const. Willi Tung Chou was found dead in his home on March 19.
Fellow officers made the discovery when they checked up on Chou because he was uncharacteristically absent from work.
Doctors have determined Chou suffered a brain aneurysm.
The Mississauga, Ont., native was 27 years old and had been an RCMP officer for just 13 months.
A private memorial service will be held for Chou on March 27, with an RCMP honour guard marching from the Nanaimo detachment to St. Paul's Anglican Church.