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Police probe shooter's past after Orlando massacre
One day after the deadliest terrorist attack since 9/11 in the U.S., police and investigators work to learn more about American-born shooter Omar Mateen. CNN's Delia Gallagher reports.
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Orlando shooting investigation 16 videos
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Police probe shooter's past after Orlando massacre
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Seddique Mateen, the father of Omar Mateen, who attacked a gay night club in Orlando before being shot dead by police, walks into his home in Port Saint Lucie, Florida, U.S. June 14, 2016. REUTERS/Carlo Allegri (Newscom TagID: rtrlseven934325.jpg) [Photo via Newscom]
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Pulse gunman's father was FBI informant
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####2016-06-29 00:00:00 Shot 06/12/2016.##
Orlando mass shooting 911 calls released
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Orlando shooter transcript
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FBI unveils killer's full 911 transcript after backlash
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Officials: Orlando shooter prepared for death before attack
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ORLANDO, FL - JUNE 17: People visit a memorial down the road from the Pulse nightclub on June 17, 2016 in Orlando, Florida. Omar Mir Seddique Mateen killed 49 people and wounded 53 others at the popular gay nightclub early Sunday. (Photo by Spencer Platt/Getty Images)
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Why Alabama county won't lower flag for Orlando
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Florida governor: Second amendment didn't kill anybody
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Gun shop owner called FBI about shooter
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Video emerges from inside the bathroom during attack
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Orlando nightclub shooter Omar Mir Seddique Mateen poses with his wife, Noor Salman, in a family photo posted online.
Source: Orlando shooter texted wife during attack
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Obama: Orlando families we stand with you
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FBI agents investigate near the damaged rear wall of the Pulse Nightclub where Omar Mateen allegedly killed at least 50 people on June 12, 2016 in Orlando, Florida. The mass shooting killed at least 50 people and injuring 53 others in what is the deadliest mass shooting in the country's history.
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SWAT chief recounts moment officers stormed Pulse
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A history of attacks on gay nightclubs
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Medical examiner describes Orlando club after shooting
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New video of Orlando shooter emerges
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Sources: Shooter's wife went with him to buy ammunition
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