maybe liz sullivan's life was more complicated than anyone knew. maybe she didn't want to be found. on a dating app. >> one day she had tinder. >> and private writings. >> it was a story about somebody that is missing. >> leaves her kids and runs and leaves it all behind? >> right. >> fiction or fact? >> it had some real actual events. >> when dateline continues. >> hi i'm jessica layton with a look at your top stories. president biden addressed the release of positives by hamas saying. the deal was rage after a quote, extensive u.s. diplomacy. the president cautioned that hamas is still holding some american citizens and it is unclear when they will be released. he also talked about the children who are released. and the second exchange between israel and hamas is expected sometime later today. and now back to dateline! and now back to dateline! >>>>> >> it didn't take very long, when san diego investigators asked family, friends to tell them about the missing liz sullivan. they ran into it right away. she was a complicated person right? >> oh, yes. yes. very complicated. >> complic