Several news outlets -- most prominently MSNBC (as of Oct 12 at 10pmEST) -- are reporting that Jamal Khashoggi may have used his Apple Watch in conjunction with an app like Just Press Record in order to capture audio of his own interrogation then have it be uploaded to the cloud. (It has been alleged that Khashoggi was then murdered.)
Turkey's Sabah newspaper first reported the story saying the audio was recorded on the watch but then discovered on Khashoggi's iphone -- that his finance was holding outside the walls of the embassy.
It has been noted that the LTE feature in Apple Watch 4 is not supported by any carriers in Turkey.
AppleInsider has the most uptodate coverage I could find in print:
https://appleinsider.com/articles/18/10/12/saudi-journalist-used-apple-watch-to-record-own-interrogation-and-execution-report-says