Ease of denying it. Ease of eliminating them. There are stories from my friends in South America of cocaine being slipped into bags before travelling through

Ease of denying it. Ease of eliminating them. There are stories from my friends in South America of cocaine being slipped into bags before travelling through security, hoping innocent random tourists will be caught and they can push large quantities through in the aftermath. Also, I would assume cronies would be involved in finding and setting up a random person.