he immigrated legally on a 10 day visa, there is no connection to illegal immigration here, why would you bring it up?
I had to state the countries I visited for the past 10 years. Jobs I had for 10 years,purpose etc when I applied for a visa. CBSA also did background checks on me, called one of my employers for verification. I figured all these by access to information reports later on out of curiosity.
How did this guy get a pass with CBSA ?
and yes, a visitor visa is legal immigration for a certain timeframe, after which you overstay your visa.
you still legally immigrated, your charge will be overstaying your visa, not related to your immigration at all.
It doesn't matter that you were allowed in legally; per the law he was expected to depart and he did not.