Today I am more open to the smuggling idea. On the one hand, her trip looks like smuggling, she goes to 2 European cities in the middle of a trip for short periods of time, a smuggling situation would fit who she might have met that day, she possibly would have a motive to get involved w such a scheme (financial), it would explain why she got a Turkish cell phone (who would pay for Turkish cell phone just to text people to meet up with??), it would explain why she wanted to leave, etc.
Each thing considered separate is nothing but all together...one could make the case....
At the same time, no experienced smuggler would have done anything to raise more red flags. I think if she was smuggling, Turkey to USA only, she would have not taken those side trips
Think if you are US Customs office in NYC: you have a single women, who made side trips to 2 European countries, traveling alone... Of course 99% of women in that scenario are not smugglers but the 2 side trips would raise more suspicion of smuggling if they found something illicit than if she just stayed in Turkey the whole time. That is why any sophisticated smuggler would not have her make those 2 side trips...nothing to raise more suspicion...