There is a "hot list" that your ticked is evaluated against, including whether you meet certain "spec's" for a person from Sweeden.
Example:
What ID did you show when you checked in? Driver's license or passport? Does the address show up in (

) "Streets and Trips". If it's a ghetto address or an apartment, expect more scruteny.
Is your route convoluted due to a travel agency shopping price, or did you make choices? Hmmm,
Do you look like a terrorist? Serious look, hard eye contact, look scornfully at the big boobed (decoy) blond that smiled at you?
Criminal record: depends on what it is. And yes, they probably know.