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Federal investigators have said there is no evidence at this point that Muhammed Youssef Abdulazeez, who shot and killed five military officers in Chattanooga Tennessee, was influenced by ISIS

Federal investigators have said there is no evidence at this point that Muhammed Youssef Abdulazeez, who shot and killed five military officers in Chattanooga Tennessee, was influenced by ISIS. CBS News national security correspondent Jeff Pegues discussed the latest on the investigation with CBSN.

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CBS News has learned the gun used by accused gunman Juan Francisco Lopez belonged to a federal agent

CBS News has learned the gun used by accused gunman Juan Francisco Lopez, an undocumented immigrant with multiple felony convictions, belonged to a federal agent. He pleaded not guilty Tuesday and has been at the center of a debate over San Francisco's "sanctuary" policy, whereby local law enforcement is prohibited to cooperate with federal immigration authorities. But the policy debate is being eclipsed by the unexpected twist in the crime itself. John Blackstone reports.

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