There will be a coroner's inquest into the double-murder suicide at a provincial government office in Kamloops on Oct. 15.
Chief coroner Terry Smith says he believes an inquest is necessary because of the speculation and conjecture surrounding the circumstances that led to the tragedy.
Smith says the inquest will likely be held next spring in Kamloops.
Pollution control officer Dick Anderson shot union shop steward David Mardon and visiting manager Jim McCracken before turning his gun on himself.
The 55-year-old Anderson had been given a letter of discipline by McCracken earlier that day.
Debate heats up over Kamloops
Some friends and colleagues of Anderson have said he was overstressed by government cutbacks and layoffs.
However, people who worked with him say he was bad-tempered manager, and that his letter of reprimand was the result of their complaints about his behaviour.
Another side to Kamloops shooter