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Las Vegas shooting: Search for motive after officers, shopper killed

CBSTV Videos 2:05 mins

Las Vegas police are searching for a motive in the killing of two officers as well as a shopper at Walmart. The suspects have not been identified yet, but investigators say it was a man and woman working together who were yelling about a "revolution" as they carried out the attack. KLAS-TV's Scott Daniels reports.

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