Hahaha, theres way! Dont u realize us borders arent that secure as u might think... Nate Norman brought double digits millions dollars of weeds, acrossed borders without going though US customs and without getting caught. Took Feds more than 2 years before they realize this. Since that had happened before so therefore theres good chances that they already have acrossed the border.
If you read in the news, they mentioned that Federal Marshal have notified authorizations in both countries Canada and Mexico... Why do you think they alerted them instead of International border customs? Cause they (Feds) knows that there is holes in border security system.
