Mujtaba al-Sweikat was a bright 17-year-old student on his way to visit Western Michigan University when he was arrested at King Fahd Airport in Riyadh, Saudi Arabia, in 2012. Since then, Mr. Sweikat has been in Saudi custody, subjected to torture, including beatings so severe his shoulder was broken, in order to extract confessions that sealed his fate: condemned to death, likely by beheading.