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BALTIMORE, MD - APRIL 26: Baltimore Mayor Stephanie Rawlings-Blake takes questions at a news conference at Bethel AME Church, April 26, 2015 in Baltimore, Maryland. Rawlings-Blake discussed the recent unrest in Baltimore surrounding the death of Freddie Gray. Gray's funeral is scheduled for Monday morning. (Drew Angerer/Getty Images)
BALTIMORE, MD - APRIL 26: Baltimore Mayor Stephanie Rawlings-Blake takes questions at a news conference at Bethel AME Church, April 26, 2015 in Baltimore, Maryland. Rawlings-Blake discussed the recent unrest in Baltimore surrounding the death of Freddie Gray. Gray's funeral is scheduled for Monday morning. (Drew Angerer/Getty Images)

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Mayor Stephanie Rawlings-Blake also announced mandatory body cams for police officers Wednesday. CNN's Evan Perez reports.

Mayor asks DOJ to investigate Baltimore police

Mayor Stephanie Rawlings-Blake also announced mandatory body cams for police officers Wednesday. CNN's Evan Perez reports.