PART ONE: BLAIR JOHNSON, WHAT HAPPENED?

The death of a popular high school student from Deane Bozeman created lots of questions a year ago.

A year later, News 13 is examining the last moments of Blair Johnson's life.

"I miss her smile, I miss her." Sarah Hall describes her daughter Blair as a typical teenager.

"Blair was just a happy go lucky, just a good spirited person, you know, (she) had a heart of gold. Oh, she had billions of friends at school that I didn't even realize. She didn't meet a stranger let's put it that way. She was just outgoing, school related; that was it. That was her everything."

Everything until October 31, 2006.

"I stayed on this side cause this is where she was in the back seat, her head was tilted down, facing toward window" says Linda Peevy. The neighbor who discovered Blair then tapped on the car window and the young girl inside didn't move.

Peevy said she felt panic and "worried that something had happened to her that night."

That night, Blair Johnson died in the back seat of her car, parked on a desolate, dirt road in Fountain.

We ask Linda what she thinks happened to Blair. "I think they were back out that way, her and someone else, and I think an accident happened."

Linda explained how the car was parked -- perfectly backed up to the gate; something Sarah thinks her daughter couldn't have done.

Sarah says, "she couldn't even drive straight let alone, back up, that straight and that car was perfectly straight, just like it pulled out of the gate instead of backed up to the gate."

Investigators quickly started retracing Blair's last moments of life. Blair got out of school early the day before to go to the dentist, but canceled the appointment.

Later in the afternoon, Blair met up with her best friend Emily at Emily's parents house. They had plans to hang out in the afternoon and well into the evening, until Blair left that night upset.

Emily says, "Blair was liking this guy that came over here. They were talking, wanting to date and then I don't know, she got real upset." Blair quickly left Emily's and drove to her cousin's house just down the road. After a brief argument there, she again left upset.

She wasn't seen again until Ms. Peevy found her the next morning.

An autopsy revealed Blair's blood alcohol level was .09 when she died; over the legal limit to drive.

We asked her Blair's friend Emily if she had any idea where she would have gotten alcohol that evening? Emily said, "I have no idea."

Investigators have ruled out foul play and closed the case. The medical exaimer says she died of hypothermia.

Sarah thinks her daughter's death was an accident. "I think it was an accident. I think something really happened to her and I think someone out here knows what happened to her. I believe someone was with her."

Linda agrees. "It does concern me because somebody knows something."

So how did Blair get to Betts Road that night? Did she drive? How long was she parked there? Where did she drink alcohol? Did she really freeze to death? And is there someone else who knows something about that night?

PART TWO: THE EVIDENCE AND HYPOTHERMIA

There was no trauma to Blair's body and an autopsy indicates there were no drugs in her system, except a trace amount of marijuana.

Investigators with the Bay County Sheriff's Office closed the case in June of 2007 and ruled out all possibilities of murder or foul play.

October 31st 2006.

A girl -- found dead in the back seat of a car parked off rural Betts Rd. in Fountain.

Capt Jimmy Stanford, with the Bay County Sheriff's Office says, "we dispatched all investigators and we began working this as if it was a homicide."

Photos from the crime scene show the blue car backed up to a gate with a young girl slumped over in the back seat. Investigators found extra clothes in the trunk and black flip flops in the front floorboard.

A Florida license reveals the driver is 18-year-old Blair Renee Johnson.

Capt. Stanford says, "from all evidence, we concluded that she died in the vehicle, by herself and no one had been in or around that vehicle."

Evidence to indicate no foul play, no trauma to the girl's body, no suspicious fingerprints, and no unidentified footprints in the sand.

Capt. Stanford explains, "if anyone had walked to that vehicle or from that vehicle, we would have been able to see some footprints." I ask, "and you didn't see any footprints?" Capt. Stanford answers, "there was none. The vehicle was locked with keys inside, the only footprints were from her leaving the driver side going to the trunk and getting in the back seat. It appears she gathered some articles of clothing to help warm herself."

The coldest temperatures recorded in Fountain that night were in the low 40s.

According to the incident report from the Bay County Sheriff's Office, Blair was wearing two pairs of pants, a T-shirt, a jacket, and no shoes.

"Hypothermia is defined as any decrease in body temperature below 95 degrees." That's according to Chief Medical Examiner Dr. Charles Siebert, who ruled Hypothermia as the cause of death.

I say to Dr. Siebert, "you don't think of someone in Florida typically dying of Hypothermia."

Dr. Siebert answers, "I think the lack of any other cause of death, the fact that she does have alcohol on board, temperatures we did have that night, actually does get fairly cold up in here in panhandle, I think all that played a role."

There are three stages of hypothermia: goosebumps, shivering, then your lips, ears, and hands turn blue.

Dr. Siebert says "the main thing is you want to keep blood supply to inner parts of organs here, so everything stays nice and warm."

Blair's blood alcohol level was .09 when she died. In Florida, anything greater than .08 is defined as "drunk driving." But we also wonder just how much alcohol did Blair consume.

An appoximate blood alcohol precentage of .09 for a girl of blair's size -- who weighed about 120 pounds -- means she would have consumed about 3 drinks, but this is only an estimate. Other factors like did she drink beer or hard liquor, in what kind of time frame she drank, and body fat are also all factors in blood alcohol levels.

According to the Center for Disease Control and Prevention's website, victims of hypothermia are often people who've consumed alcohol.

Something Dr. Siebert says helped speed up the effects of hypothermia. "Alcohol prevents body from shivering and also causes peripheral vessels -- blood vessels in arms, hands, and fingers to dialate, so instead of blood being brought to middle of body when its going to keep vital structures warm, it's going into external parts of body or outer parts of body which is going to increase coldness or hypothermia."

Dr. Siebert says people really can freeze to death in temperatures above freezing. "Actually there have been studies done that temperatures as low as in the 50-60s are enough to cause hypothermia in people because it's more of an effect of how long you're in it and how your body reacts to it. As I said she was a petite girl, fairly small and had alcohol effects and she was out there for quite some time."

The exact amount of time she was sitting in the parked car on Betts Road that night remains unknown. Blair was last seen around 9 pm and spotted the next morning around 8. The 11 hours of unaccounted time is something that leaves her family suspecting something bad.

I ask Capt. Stanford, "Blair's mother feels that someone else out there knows something that happened that night. Do you feel there's more to the story?"

Capt. Stanford replies, "I don't think there's any information out there that's going to shed light on some horrific thing that happened to Blair."