Millions of motorists use GPS devices in their cars to help navigate around town. One driver didn't realize the police would use it, too - to convict him of murdering his family.

By MITCH STACY, Associated Press Writer Thu Aug 28, 3:27 PM ET
Like millions of motorists, Eric Hanson used a GPS unit in his Chevrolet TrailBlazer to find his way around. He probably didn't expect that prosecutors would eventually use it too - to help convict him of killing four family members.

Prosecutors in suburban Chicago analyzed data from the Garmin GPS device to pinpoint where Hanson had been on the morning after his parents were fatally shot and his sister and brother-in-law bludgeoned to death in 2005. He was convicted of the killings earlier this year and sentenced to death.
To read the rest of the story, click to