The bodies of a woman and two men were found inside a home in the town on April 27.
Fifty-four-year-old Reuben Buhler was arrested and charged the next day.
Now police are asking for the public's help in establishing Buhler's actions last Sunday and Monday.
Police say Buhler would have been driving his 1998 red-and-silver Dodge Ram truck or a 1992 teal-coloured Ford Mustang convertible.
An RCMP statement says no information is too minor, and if anyone saw the man or those vehicles in the area they should call the Burns Lake RCMP detachment.