Your Fitbit can betray you

Allegra Czerwinski of Dayton is among millions of people who wear a Fitbit during workouts. The device, worn on the wrist, collects data about your workouts and physical activities. But, Allegra did not know that this data could be compromising her privacy.

"I know there's a level of risk associated any time you put your personal information into something that's connected to the internet, but I didn't realize anyone would care about my personal information from my steps to my sleep patterns," said Czerwinski.

We've learned that data from your Fitbit is now being used as evidence in some court cases. In Lancaster, Pennsylvania, police responded to a 911 call by a woman who claimed she was raped by a home invader. 

Jeannine Risley told police that she had been sleeping when a man came into her bedroom around midnight and sexually assaulted her. She admitted that she was wearing a Fitbit at the time.

"It was told to me that the Fitbit was disrupted or torn off in the struggle," said Detective Chris Jones, of the East Lampeter Township Police Department. 

However, once detectives found her Fitbit and looked at the data, it all told a different story about that night. 

"I would have expected to see sleeping, no motion, no activity through the hours prior to the incident and it turned out, that's not what we saw," Jones said. 

With the lack of other evidence, Risley was charged with filing a false report. 

Attorney Bruce Hagen said data from a Fitbit or a Smart watch can now be used as evidence in court. It can back up an alibi or tell authorities that you are lying. 

"This information doesn't lie, right? So what's on your Fitbit, that's what you did," said Hagen. "Folks quite don't understand how their private lives are not really private anymore."

Attorney Chris Simon said when it comes to personal privacy, we all need to do a little homework. 

"Find out how much of my life is being recorded and think worst-case scenario. Do I really feel like being followed around like this? Is the advantage of knowing my physical fitness routine worth the loss of human privacy that's down the road? I think not," said Simon.

Allegra Czerwinski will continue to wear her Fitbit and she believes if people are telling the truth in court cases, they have nothing to worry about. 

"It turns out that it might be a really good way of holding people accountable," Czerwinski said.