he's -- but he said it before. he would say things like, "i'll kill the [ bleep ]." >> did you ever think he was serious? >> no. >> reporter: they then asked danielle about the messages she sent back to him. >> "i'm so close to introducing them both to daisy." >> i remember saying that. i didn't have daisy with me, though, at the time. nor would i do anything with a gun. i mean, i think i was trying to impress michael in a weird way. >> do you think they're joking with each other? or do you think it's real? >> i asked danielle that very question, "why, why are you saying this?" and she just said, "oh, we just, you know -- i'm just trying to sound tough." so she denied this to be for real. >> reporter: but that's not the way sam's sister saw it. when detectives showed those texts to cindy, she was dumbstruck. >> i could not believe what i was reading. this is someone who's been in my family for almost 13 years.