Sneak peek: The Fitbit Alibi | Forensic Files

to most Wisconsin i'ts Green Bay is the magical place it's where the Packers play it's a fun
town and everybody knows everybody drinking is part of the Wisconsin tradition Green Bay is a great downtown
pulse and I feel it's relatively safe nobody would ever think that something like this would happen in our
communities continuing coverage tonight of a death investigation in the village of Bellevue when I had gotten the news I
just shook I just shook there is police activity in a field I was a good friend of Nicole vanderheiden's
she was my neighbor we watched each other's kids she just was a ball of fire Nicole Vanderheiden was 31 years old she
was living with her boyfriend Doug D tree and they had just had a baby together it was Friday May 20th of 2016 Doug and
Nicole decided to go out that night this was an opportunity for them to go out and have a great time
the night didn't end in a great time it ended in a nightmare Nikki walked off into the darkness that
night she just walked off she vanished that was the last anyone saw her about where was she found right down this
embankment when we arrived and see on this one you kinda knew right away it was probably gonna be different at the
scene that was the most apparent thing is the trauma to the left side of the face when you came here there's no way
to identify it you had no idea who she was not right away no Doug D tree he woke up in the morning eventually later
that afternoon he had called the sheriff's officer 9-1-1 to report that his girlfriend did not come home from
the night before we sent some officers over to her residence to take the missing person report so this is not
normal behavior for her and this is where Nicole was living correct and you believe that she was killed here correct
across the street in the roadway a large quantity of blood that was determined to
be Nicole's everything's pointing to Doug D trees yeah so that so then Monday night right now I'm gonna be taking you
we felt we had probable cause to arrest Doug b-tree I'm a decent guy I think people were shocked people are wondering
could he have done it did Doug do it his alibi was his Fitbit that he had been wearing all night and
that supposedly proved that he was asleep at the time of her murder the technology
is really what drew me to this case we had this evidence wanted to check out have tested at the lab the DNA evidence
starts to come back and it belonged to an unidentified male subject outside on the porch that was our goals to figure
out who is this mystery person it's definitely a whodunit there's lots and twists and turns to it and it's hard to
know who's telling the truth

A suspect in a murder swears he didn't do it – can his Fitbit prove he's innocent? "48 Hours" correspondent Erin Moriarty investigates Saturday, Oct. 20 at 9/8c on CBS.

Get the latest news and best in original reporting from CBS News delivered to your inbox. Subscribe to newsletters HERE: http://cbsn.ws/1RqHw7T

Get your news on the go! Download CBS News mobile apps HERE: http://cbsn.ws/1Xb1WC8

Get new episodes of shows you love across devices the next day, stream local news live, and watch full seasons of CBS fan favorites anytime, anywhere with CBS All Access. Try it free! http://bit.ly/1OQA29B

--- "48 Hours" investigates the most intriguing crime and justice cases that touch on all areas of the human experience including greed and passion. For 27 seasons, "48 Hours" has developed a rich history of original reporting and impact journalism that has helped exonerate wrongly convicted people, caused cold cases to be reopened and solved, and along the way changed lives. Check local listings for "48 Hours" broadcast times.

Brief Summary

The episode details the investigation of Nicole Vanderheiden's death, focusing on her boyfriend Doug D tree and mysterious DNA evidence.

Key points

The Disappearance of Nicole Vanderheiden. Nicole Vanderheiden vanished after a night out with her boyfriend, leading to a tragic investigation.
The Shocking Discovery. Nicole's body was found with signs of trauma, raising immediate suspicions.
The Alibi and the Evidence. Doug D tree claimed he was asleep during the murder, but evidence suggests otherwise.

Episode highlights

Episode quotes

I just shook there is police activity in a field.

Witness reaction to shocking news

0:35WatchMar 21, 2018

More from 48 Hours

Solve the Crime

Read a real case one clue at a time, then see how your call held up against the investigators.