Im AGAINST conspiracy theories as a rule.....too easy to speculate about ANYTHING.
But this case simply does not make sense as I understand it.

Nine pounds of dope thrown casually in her luggage. Going to a third world country to SELL WEED? I mean...HUH??? Plus she's with her family including her mother. ("Hang on Mom....one more thing to pack....")

No WAY!!! Too stupid even to comtemplate. Somebody chucked it in while she wasn't looking. That's someone's else's dope who was close to getting caught and they stuck it the first place they could.

I'd be very upset too if it were me. That poor kid's been screwed over big time.