“I can’t breathe” were the final words uttered by Saudi journalist Jamal Khashoggi after he was set upon by a Saudi hit squad at the country’s consulate in Istanbul, a source briefed on the investigation into his killing told CNN on Sunday. The source, who has read a translated transcript of an audio recording of Khashoggi’s painful last moments, said it was clear that the killing on October 2 was no botched rendition attempt, but the execution of a premeditated plan to murder the journalist. During the course of the gruesome scene, the source describes Khashoggi struggling against a group...