Istanbul, Turkey—Salah Muhammad al-Tubaigy, a Saudi doctor and forensics expert, is reportedly responsible for the death of the missing Saudi journalist and regime critic Jamal Khashoggi.

On Oct. 2, Khashoggi, a U.S. resident and columnist for The Washington Post, vanished after entering the Saudi consulate in Istanbul. The Turkish government says that Khashoggi was murdered and his body hidden.

Al-Tubaigy was seen entering Istanbul by the airport’s CCTV. What followed is more akin to a thriller script than to reality.  According to Turkish officials, who claim that the whole operation was recorded by the journalist’s Apple watch, the doctor proceeded to dismember Khashoggi with a bone-saw. Judging from the recording, Khashoggi was still alive whilst the doctor hacked him to pieces. Al-Tubaigy is heard recommending to members of the Saudi death-squad to wear headphones and listen to music to avoid the grim sounds of the operation. It appears that the Saudi hit-team was comprised of 15 secret service and intelligence officers.