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HOLLYWOOD, CA - AUGUST 16:  Bobbi Kristina Brown (R) and Nick Gordon arrive at Tri-Star Pictures' "Sparkle" premiere at Grauman's Chinese Theatre on August 16, 2012 in Hollywood, California.  (Photo by Frazer Harrison/Getty Images)
HOLLYWOOD, CA - AUGUST 16:  Bobbi Kristina Brown (R) and Nick Gordon arrive at Tri-Star Pictures' "Sparkle" premiere at Grauman's Chinese Theatre on August 16, 2012 in Hollywood, California.  (Photo by Frazer Harrison/Getty Images)

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    Investigators focus on Bobbi Kristina's boyfriend

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Investigators focus on Bobbi Kristina's boyfriend

Police are investigating the source of unexplained injuries on Bobbi Kristina Brown when she was found unresponsive in a bathtub. Nick Valencia reports.

Investigators focus on Bobbi Kristina's boyfriend

Police are investigating the source of unexplained injuries on Bobbi Kristina Brown when she was found unresponsive in a bathtub. Nick Valencia reports.