A chronology was provided to the committee earlier today, and I can't speak to any further details about the cases. However, the son did come to Canada, according to the chronology, at the Fort Erie land border on February 17, 2020. If we look at the chronology of the father, in 2020, the father was already a convention refugee in Canada.
With regard to security screening in general, all in-Canada asylum claims—this would be considered an in-Canada asylum claim because it was made at the border—are subject to 100% comprehensive security screening. As to what that comprehensive security screening comprises, I can turn to my colleague at the CBSA for further details.