Investigators from the Transportation Safety Board of Canada came to the end of the field stage of their examination of yesterday’s mid-air crash near Pemberton.
Regional Manager Bill Yearwood says one piece of evidence could help the TSB figure out why the crash occurred.
"On site yesterday afternoon we were able to access the glider debris field and gather most of the debris. It includes some valuable pieces, including a GPS, which we're hoping to download."
Yearwood says the lack of video or audio recording devices on either plane makes piecing things together challenging.
He says the TSB Board is considering mandating the inclusion of affordable recording equipment on aircrafts.
All four people on board the power glider and Cessna airplane were killed as a result of the crash.
The pilot of the glider has been identified.
Rudy Rozsypalek was a long-time pilot who co-owned the Pemberton Soaring Centre.
That company's website has been taken down and replaced with a page that states that the company has suspended operations.