The press conference is scheduled for 11 a.m. at the Abbotsford Police Department.
Gill, 40, was out for a walk with her husband on the evening of April 27, 2009 when she was struck by a pickup truck in the area of Townshipline Road and Bell Road, east of Highway 11.
Responding officers were flagged down by her husband, who led them to a water-filled ditch where Gill had been thrown by the impact.
Police seized a suspect vehicle with signs of damage dumped on acreage several blocks away.
The incident was reported as a hit-and-run accident at the time and no further details were released publicly.