FILE - In this June 15, 2015 file photo, Dallas Police Chief David Brown briefs the media about a shooting at Dallas Police headquarters in Dallas. Still recovering from the July sniper attack that left five law enforcement officers dead, the Dallas Police Department is facing a new crisis as its pension fund approaches insolvency and scores of officers, including Brown announced their retirement. Brown will retire Oct. 22 after 33 years with Dallas police. (AP Photo/Tony Gutierrez, File)
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