Amber Alert Issued for Colorado Girl, 10

Jessica Ridgeway's backpack, water bottle were found after she vanished walking to school.
3:00 | 10/08/12

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Transcript for Amber Alert Issued for Colorado Girl, 10
colorado, the latest for the search for a little girl last seen walking to school on friday. Police are zeroing in on an area where they found 10-year-old jessica ridgeway's backpack. Clayton sandell is covering that recovery. Reporter: Good morning to you. Police are going through that backpack. It is a major clue and the first promising lead in a case that has so far investigators stumped. We've been looking for a lead and this possibly is that. Reporter: Police swooped in on this denver subdivision sunday after a man e-mailed his neighbors about a backpack and water bottle he found on the sidewalk. He wrote an e-mail that said there's property that has the name of jessica ridgeway. 20 minutes after he received that, he received an e-mail that said this may be the missing girl. Reporter: Officers immediately shut down this neighborhood six miles from where jessica disappeared. He believes the backpack to be jessica's. Reporter: Jessica's mother sarah said she last saw her friday morning walking. When jessica didn't show up for school, the staff called her mom, sarah said she was sleeping after working the graveyard shift and didn't get the call. By the time she got the message, eight crucial hours had parsed. Over the weekend, 800 volunteers came to search, scouring hills and roads. Teams with dogs over the streets. Overnight, jessica's father jeremiah bryant provided this photograph of his daughter. Bryant lives 600 miles away in missouri. He said the photo was taken six weeks ago. Jessica's parents are in the middle of austody suit over their daughter. But police say they don't believe that has anything to do with her disappearance. For now, investigators say they haven't ruled anyone in or out. The idea or thought that she was taken by a stranger clearly is possible. But statically, it's going to be a very small number. But investigators stress they still do not have any suspects and still need tips from the public. Right now, they're using a bloodhound in the area where jessica's backpack was found. Hoping to bring her home. Thanks very much. George, now to that former

This transcript has been automatically generated and may not be 100% accurate.

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