After seeing the video featuring the "private school teacher who may have owned or was a partner in a restaurant" who is now fighting for freedom in the Ukraine it seems obvious that there were locals/foreigners involved in his drug business or were benefiting from it. She got caught. Everyone else went to ground including the boyfriend who remains at large. She received one package and gets the death penalty? No other arrests? No assets seized? Was this a lengthy and thorough investigation Samui style?
She is guilty and paying the price while the boyfriend is enjoying his freedom and ill gotten gains. I'd bet he isn't sending her any kites or socks or money or will be during her lengthy sentence.