hubers. >> reporter: shayna herself never takes the stand in trial. >> you know what, shayna hubers, wherever she is, i did her justice. >> reporter: her lawyer knows he only has to convince one juror. did he? >> the police do not determine guilt of innocence. you do. >> we had to decide, was she under extreme emotional distress, or was it just something that she did? >> reporter: but what was the secret one juror was keeping that could make the whole case collapse? stay with us. to the woman in the mid-90's showstopper... hot blooded, check it and see... got a fever of 103... feelin' hungry? how 'bout a donut? i'm hot blooded..i'm hot blooded! whether it's 30-years old or 30-days old, carmax will appraise it in as little as 30 minutes. and then your only concern will be how to spend the cash. rad. happening now? the perfect brow new brow drama pomade crayon from maybelline new york. our 1st creamy, pigmented wax crayon sculpts and tames as it colors, in one easy swipe. maybelline's new brow drama pomade make it happen maybelline new york we stop arthritis pain, so you don't have to

. >> whoo, good job, shayna!hat's my girl. >> but soon, rick loses sight of her, and when he does find her in the air, there's trouble. >> when i saw her, she was under a solid white parachute, which i know is a reserve, they're solid in color. >> rick knows something is wrong. shayna has made the decision to cut away her main parachute. that can't be good. >> after about four or five times spinning one way, i'm realizing, man, she's flying a bad parachute. >> shayna's chute has what's known as a hung slider, the nylon webbing that slides down the lines during deployment is stuck. as a result, her reserve parachute only partially opens and she's spinning out of control at a tremendous speed. >> shayna! pump the brakes! pump the brakes! pump the brakes! i started screaming "pump the brakes! that's what you hear in the video. i'm screaming, you know, "pump the brakes! pump the brakes!" we're getting closer and closer and closer to the ground, and it wasn't happened. >> within seconds she crashes into a parking lot.

you ever seen someone act as bizarre as shayna has so far from what you've seen? >> i've been in this business a long time, chris. i've never seen anything so odd, and investigators who have been spending a career at this had never seen such a scene unfold in that interrogation room. remember, she was read her any questions whatsoever. she did a monologue. it was like an off broadway show with sharon hubers and spoke for nearly three hours telling a fascinating tale. we get into that in our two- hour show. >> the big question is does anybody believe it. >> does this look like a case of cold-blooded murder? >> it is a case of obsession and a killing. the question is and what it comes down to with this jury is whether or not ryan poston who kept firearms at his home and he would always keep a handgun on the kitchen table, whether he grabbed that gun as shayna hubers alleged and started moving toward her she claimed in one of her stories she took the gun from him and shot him. we'll find out if this is self- defense or not, but the fascinating thing chris is this is