Cathy Lanier

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In this Oct. 3, 2013, file photo, Washington Police Chief Cathy Lanier speaks on Capitol Hill in Washington. Lanier is stepping down to become head of security for the National Football League. The police department announced Lanier's departure Tuesday, Aug. 16, 2016, on Twitter. Lanier said in a letter to the department's 3,700 officers that she is taking the job at the NFL. (AP Photo/Molly Riley, File)

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Washington Police Chief Cathy Lanier, left, with Washington Mayor Muriel Bowser, center, and Vice Admiral Dixon Smith, head of Navy Installations Command, speaks to the media during a news conference about the Navy Yard, Thursday, July 2, 2015, in Washington. (AP Photo/Jacquelyn Martin)

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Washington Mayor Muriel Bowser listens at left as Police Chief Cathy Lanier speaks during a news conference in Washington, Thursday, May 21, 2015, to discuss the investigation into the mysterious slayings of a wealthy Washington family and their housekeeper. Lanier said investigators believe a suspect in the slayings is in the Brooklyn area of New York City. (AP Photo/Cliff Owen)

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D.C. Police Chief Cathy Lanier (left) with Mayor Muriel Bowser, said that police are seeking a man seen in a brief surveillance video for questioning in connection with a fire at a home in Northwest Washington, Thursday, where four people were found dead. (Associated Press)

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Officer Deborah Domino models the AXON Body from Taser, a camera that attaches an officer's shirt as Washington, D.C. MPD Chief Cathy Lanier announces that the police department is testing 5 different kinds of body-worn cameras during a pilot program, during a press conference at the Wilson Building, Washington, D.C., Wednesday, September 24, 2014. (Andrew Harnik/The Washington Times)

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D.C. police Chief Cathy Lanier (left) and Mayor Vincent Gray announce that the police department is testing five different kinds of body-worn cameras as part of a pilot program during a press conference at the Wilson Building in D.C. on Sept. 24, 2014. (Andrew Harnik/The Washington Times) **FILE**

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Officer Deborah Domino models the AXON Body from Taser, a camera that attaches an officer's shirt as Washington, D.C. MPD Chief Cathy Lanier announces that the police department is testing 5 different kinds of body-worn cameras during a pilot program, during a press conference at the Wilson Building, Washington, D.C., Wednesday, September 24, 2014. (Andrew Harnik/The Washington Times)

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Left to right: Officers Benjamin Fetting, Deborah Domino, and JaShawn Colkley wear different brands of body cameras as Washington, D.C. MPD Chief Cathy Lanier announces that the police department is testing 5 different kinds of body-worn cameras as part of a pilot program, during a press conference at the Wilson Building, Washington, D.C., Wednesday, September 24, 2014. (Andrew Harnik/The Washington Times)

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Washington, D.C. MPD Chief Cathy Lanier announces that the police department is testing 5 different kinds of body-worn cameras as part of a pilot program, during a press conference at the Wilson Building, Washington, D.C., Wednesday, September 24, 2014. (Andrew Harnik/The Washington Times)

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Left to right: Officers Benjamin Fetting, Deborah Domino, and JaShawn Colkley wear different brands of body cameras as Washington, D.C. MPD Chief Cathy Lanier announces that the police department is testing 5 different kinds of body-worn cameras as part of a pilot program, during a press conference at the Wilson Building, Washington, D.C., Wednesday, September 24, 2014. (Andrew Harnik/The Washington Times)

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Officer JaShawn Colkley models the AXON Flex from Taser, a camera that attaches to glasses as Washington, D.C. MPD Chief Cathy Lanier announces that the police department is testing 5 different kinds of body-worn cameras during a pilot program, during a press conference at the Wilson Building, Washington, D.C., Wednesday, September 24, 2014. (Andrew Harnik/The Washington Times)

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Officer JaShawn Colkley models the AXON Flex from Taser, a camera that attaches to glasses as Washington, D.C. MPD Chief Cathy Lanier announces that the police department is testing 5 different kinds of body-worn cameras during a pilot program, during a press conference at the Wilson Building, Washington, D.C., Wednesday, September 24, 2014. (Andrew Harnik/The Washington Times)

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Officer JaShawn Colkley models the AXON Flex from Taser, a camera that attaches to glasses as Washington, D.C. MPD Chief Cathy Lanier announces that the police department is testing 5 different kinds of body-worn cameras during a pilot program, during a press conference at the Wilson Building, Washington, D.C., Wednesday, September 24, 2014. (Andrew Harnik/The Washington Times)

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Left to right: Washington, D.C. Metropolitan Police Chief Cathy Lanier, Council Chairman Phil Mendelson, and Washington, D.C. Attourney General Irv Nathan, address the the media about emergency legislation to amend District laws to conform to the court's recent Palmer v. District of Columbia ruling on the DistrictÕs gun laws during a press conference at the Wilson Building, Washington, D.C., Wednesday, September 17, 2014. (Andrew Harnik/The Washington Times)

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Washington, D.C. Metropolitan Police Chief Cathy Lanier, left, is on hand as D.C. public officials speak to the media about emergency legislation to amend District laws to conforming to the court's recent Palmer v. District of Columbia ruling on the DistrictÕs gun laws during a press conference at the Wilson Building, Washington, D.C., Wednesday, September 17, 2014. (Andrew Harnik/The Washington Times)

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Left to right: Council Chairman Phil Mendelson, Washington, D.C. Metropolitan Police Chief Cathy Lanier, Washington, D.C. Mayor Vincent C. Gray, address the media about emergency legislation to amend District laws to conform to the court's recent Palmer v. District of Columbia ruling on the DistrictÕs gun laws during a press conference at the Wilson Building, Washington, D.C., Wednesday, September 17, 2014. (Andrew Harnik/The Washington Times)

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Left to right: Washington, D.C. Metropolitan Police Chief Cathy Lanier, Washington, D.C. Attourney General Irv Nathan, Council Chairman Phil Mendelson, address the the media about emergency legislation to amend District laws to conform to the court's recent Palmer v. District of Columbia ruling on the DistrictÕs gun laws during a press conference at the Wilson Building, Washington, D.C., Wednesday, September 17, 2014. (Andrew Harnik/The Washington Times)

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Left to right: Council Chairman Phil Mendelson, Washington, D.C. Metropolitan Police Chief Cathy Lanier, Washington, D.C. Mayor Vincent C. Gray, and Councilmember Tommy Wells address the media about emergency legislation to amend District laws to conform to the court's recent Palmer v. District of Columbia ruling on the DistrictÕs gun laws during a press conference at the Wilson Building, Washington, D.C., Wednesday, September 17, 2014. (Andrew Harnik/The Washington Times)

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Washington, D.C. Metropolitan Police Chief Cathy Lanier, left, is on hand as D.C. public officials speak to the media about emergency legislation to amend District laws to conforming to the court's recent Palmer v. District of Columbia ruling on the DistrictÕs gun laws during a press conference at the Wilson Building, Washington, D.C., Wednesday, September 17, 2014. (Andrew Harnik/The Washington Times)

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Washington, D.C. Metropolitan Police Chief Cathy Lanier, left, and Council Chairman Phil Mendelson, right, listen as Washington, D.C. Mayor Vincent C. Gray, center, speaks to the media about emergency legislation to amend District laws to conform to the court's recent Palmer v. District of Columbia ruling on the DistrictÕs gun laws during a press conference at the Wilson Building, Washington, D.C., Wednesday, September 17, 2014. (Andrew Harnik/The Washington Times)