Why someone may be sent to enhanced security screening?

[Raiz315]

I checked publicly available CBSA manual but indicators why someone may be sent to enhanced SS are hidden. Are there any insiders info or any other information why?

 

[iSaidGoodDay]

I checked publicly available CBSA manual but indicators why someone may be sent to enhanced SS are hidden. Are there any insiders info or any other information why?

Those are(for good reasons) not to be disclosed. You can read through this thread to understand available info: https://www.canadavisa.com/canada-immigration-discussion-board/threads/the-anatomy-of-a-background-check-in-depth-analysis.500146/