A special Oz investigation: Former Army Ranger Gary Smith was sentenced to 35 years in prison for killing his roommate, fellow Army Ranger Michael McQueen. Gary claims he did not kill Michael. Can new medical technology clear his name? Can we look into someone’s mind and tell if they’re guilty of a crime? Oz has never-before-seen footage that goes behind the scenes of a murder case.

Could you imagine making 4.6 billion calls in a month?

That's how many robocalls Americans received in February this year. And when your phone is ringing endlessly with scammers asking about your car's warranty, a free cruise, or even a scary warning about your insurance coverage, it can definitely seem like all the calls are going to you. So what do you do when you get one of these fake calls and how do you protect your personal information and money from cons? Here are the important steps to take.

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