As many believed, the RCMP apparently did keep copies of the long gun registries after being directly told by Parliament to destroy them:
Evidence shows Mounties kept a copy of the gun registry"The long-gun registry was brought into being in 1995 with Bill C-68 but was done away with after the passage of Bill C-19 in 2012.
Yet, here was Burlew looking at a document from 2019 with information that could only have come from the registry.
“This shows that there is someone within the RCMP who has deliberately lied to Parliament and the courts.”
“The keeping of these records was calculated and a premeditated act designed to contravene the will of Parliament.”
... regardless of your position on guns, every Canadian should be concerned when a police force actively subverts the laws they are sworn to uphold."
https://torontosun.com/opinion/columnists/lilley-evidence-shows-mounties-kept-a-copy-of-the-gun-registry