believes that khashoggi was strangled and dismembered soon after he entered that saudi consulate in istanbul. turkish officials also saying that a visit from saudi arabia's top prosecutor yielded no, quote, concrete results. and there are new developments into the new boeing jet that crashed right into the ocean. investigators are now hearing pings that could lead them to the black boxes of that lion air jet, and possible clues about why the brand new plane plunged into the sea. abc's bob woodruff tonight reporting from jakarta. >> reporter: tonight, indonesian investigators are hoping pings detected at sea could help lead them to the most crucial element needed for their investigation, the black box. divers already bringing back shiploads of debris and also body bags. identifying the first victim, a 24-year-old woman, one of the 189 on lion air flight 610. this video given to abc showing passengers boarding an hour before the tragedy. one man showing us this photo. he is on the left, but took a