Blind mules are a huge problem in Mexico, where they are unwittingly used to courier drugs over the border. Most end up in prison and have to prove their innocence via public campaigns.
Oddly enough, it can work, if handled correctly. Opening the baggie was a bad move however, and if he didn't have a contact with the cops already, they may take it as intent.
I think that depends a lot on the time it takes you to call the cops and say someone just delivered 12 baggies vs flushing them down the loo as they kick in the door
http://edition.cnn.com/2012/01/23/world/americas/mexico-blin...