first thing we did-- call harlin bird in for another interview. yeah. i think finally we got our guy here. yes. because you'd been kind of, mm, wonky about him before, right? yes. things look like they're adding up that we might finally have something on harlin. keith morrison: harlin came back to the station-- this time with an attorney. harlin admitted he'd been to the abandoned building where the costume was found. none of a harlin was adamant he never saw chelsea at the party. he made up the story. he had nothing to do with her disappearance. he did appear to be nervous, like, you know, this is getting serious now. i really made everything up. i really have no involvement. i'll do whatever you want. keith morrison: harlin took the test and passed. are they accurate or are they not? can somebody deceive them? but we also obtained a dna sample from harlin bird because we did recover the leotard and wig. keith morrison: yeah. and we had a pretty good feeling there was going to be some kind of dna on there. so he did give us a dna sample. keith morrison

keith morrison: they put some pressure on harlin.is story kind of got-- you know, it wasn't making sense at all. and that's when, you know, ultimately we ask him did you ever see her, do you even know chelsea? did you have any contact with her? he ultimately said, no, i just wanted to look good. keith morrison: he made the whole thing up. he made the whole thing up. keith : of course, they had to waste more time checking harlin's stories, whether made up or not. come on. keith morrison: and then they arrested him for lying to the police. what's it like to think you got a lead like that, and then, poof, it's gone? it's deflating. keith morrison: still, something about that young man-- as they moved on, they kept him in mind just in case. coming up, one tip that sounds too good to be true-- and another tip that's all too real. she says, oh my god, brian, that's her shoe. keith morrison: when dateline continues-- type 2 diabetes? discover the ozempic® tri-zone. i got the power of 3. i lowered my a1c, cv risk, and lost some weight. in st