This person entered Canada on the dates you described, Mr. Caputo, and as reflected in the chronology. The security services—CBSA, CSIS and the immigration department—did all of the existing security checks and the normal security checks, including biometrics by the RCMP on a number of occasions. There was no information at the time those decisions were made that would have come to light to trigger what happened earlier this spring in terms of CSIS's investigation.
On August 28th, 2024. See this statement in context.