airliner went down. >> earlier today, there was a plane crash in the alps. 150 people died. >> reporter: she shared obscure biographical details. >> my first concert with me bethany and her mom, blink 182. >> it's a proof of life audio, saying she is denise and she is the victim. >> reporter: and she's aware of events that happened that day. >> she is aware of events that happened to prove she was alive. >> reporter: it wasn't a murder case, but was it a kidnapping as aaron claimed? we found it odd that denise didn't sound at all frightened. >> she sounded calm. not terrified. not distressed at all. >> reporter: not someone in fear for her life. >> as if she was talking with someone over coffee. i shared it with my colleagues