Chicago Police Department

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This June 2, 2018, file photo provided by the Chicago Police Department shows weapons turned in by residents in a gun buyback program co-sponsored with the New Life Covenant Church Southeast in the 6th Police District. More than 400 guns and rifles were handed over in exchange for $100 gift cards. (CPD via AP) ** FILE **

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This undated file photo released by the Chicago Police Department shows Andrew Warren, an employee of the University of Oxford in Britain. Warren and Northwestern University professor, Wyndham Lathem, both wanted in the fatal stabbing of a Chicago man have been taken into custody in Oakland, California, a Chicago police spokesman said Friday, Aug. 4, 2017. (Chicago Police Department via AP, File)

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This undated photo released by the Chicago Police Department shows Andrew Warren, an employee of the University of Oxford in Great Britain. A judge on Monday, July 31, 2017, issued arrest warrants for Warren and Northwestern University professor, Wyndham Lathem, in connection to the stabbing death of a Chicago man on July 27. (Chicago Police Department via AP)

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FILE - In this July 28, 2016 file image made from a body camera video provided by the Independent Police Review Authority, Chicago police officers fire into a stolen car driven by Paul O'Neal, killing him, in Chicago. California state legislators will hold a hearing on a bill requiring police body camera video to be released after fatal police shootings and other significant incidents. The Senate Public Safety Committee will hold a hearing Tuesday, July 11, 2017 on Assembly Bill 748, which seeks to establish a statewide policy on when body camera should be released. (Chicago Police Department/Independent Police Review Authority via AP)

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FILE - In this Oct. 20, 2014 file image taken from dash-cam video provided by the Chicago Police Department, Laquan McDonald, right, walks down the street moments before being fatally shot by Chicago Police officer Jason Van Dyke in Chicago. Three Chicago police officers have been indicted on felony charges alleging they conspired to cover up the fatal shooting of black teen Laquan McDonald by a white officer. The three officers, Thomas Gaffney, David March and Joseph Walsh, were each charged Tuesday, June 27, 2017, with conspiracy, official misconduct and obstruction of justice. (Chicago Police Department via AP, File)

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FILE - In this Oct. 20, 2014 frame from dash-cam video provided by the Chicago Police Department, Laquan McDonald, right, walks down the street moments before being fatally shot by CPD officer Jason Van Dyke sixteen times in Chicago. The video of McDonald's 2014 death prompted protests and demands for sweeping reforms. Several leading community groups filed a class-action lawsuit against the city of Chicago on Wednesday, June 14, 2017, in a bid to bypass or even scuttle a draft agreement between the city and the U.S. Department of Justice that seeks to reform the nation's second largest police force without federal court oversight. (Chicago Police Department via AP File)

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This undated photo provided by the Chicago Police Department shows Angel Gomez. Gomez is charged in the Tuesday, May 2, 2017, shooting and wounding of two plainclothes Chicago Police officers. He faces counts of attempted murder and aggravated battery with a firearm. He's suspected of driving the vehicle in which the shooters were riding. (Chicago Police Department via AP)

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This undated photo provided by the Chicago Police Department shows Anthony Moore. Moore of Chicago, has been charged in the Aug. 14 slaying of Arshell Dennis III, the son of a Chicago police officer. He was arrested and charged with one felony count of first degree murder and two felony counts of attempted first degree murder Friday, May 5, 2017 (Chicago Police Department via AP)

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FILE - This undated autopsy diagram provided by the Cook County Medical Examiner's office shows the location of wounds on the body of 17-year-old Laquan McDonald who was shot by a Chicago Police officer 16 times in 2014. Chicago Police Officer Jason Van Dyke was charged with first-degree murder in November 2015, on the same day that the city, under a judge's orders, released dashcam video showing McDonald, a 17-year-old black man, being shot 16 times on Oct. 20, 2014. Van Dyke, who is white, has pleaded not guilty. The video prompted local and federal investigations; The Justice Department determined in January that Chicago police have a long history of civil rights violations and excessive force. (Cook County Medical Examiner via AP)

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This undated photo provided by the Chicago Police Department shows Earl Wilson. Wilson is the second person to be charged in connection with the death of Cook County Circuit Court judge Raymond Myles, who was gunned down outside his home earlier April. Chicago police announced Thursday, April 27, 2017, that first-degree murder charges have been filed against Wilson. Chicago Police Department via AP)

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This undated photo provided by the Chicago Police Department shows Joshua Smith. Smith was charged Wednesday April 12, 2017, in the killing of a criminal court judge who was shot to death outside his Chicago home after a woman he knew was wounded by gunfire. (Chicago Police Department via AP)

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This undated photo provided by the Chicago Police Department shows Maurice Harris, who has been charged in the fatal shootings of several men at or near a Chicago restaurant. Harris was arrested Tuesday, April 4, 2017, in connection with the March 30 slayings. (Chicago Police Department via AP)

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This undated photo provided by the Chicago Police Department shows Yasmine Elder. Elder has been ordered held on $1 million bond for forcing her boyfriend to drink bleach, leading to his death. Prosecutors said during a Thursday, March 9, 2017 bond hearing that Elder and Darius Ellis were arguing in a van Monday but the argument turned physical and Elder got the upper hand. (Chicago Police Department via AP)

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FILE - In this June 12, 2017 file photo, Chicago Police Superintendent Eddie Johnson speaks with with residents of Chicago. Superintendent Johnson visited New York to learn how it has achieved success in fighting crime. Johnson came home with ideas aimed at increasing community trust by using technology to get Chicago police officers out of their squad cars and putting new cadets in neighborhoods to walk the streets. (AP Photo/Teresa Crawford, File)

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This photo provided by the Chicago Police Department shows Devon Swan. Chicago police spokesman Anthony Guglielmi said Saturday, Feb. 18, 2017, that Swan was charged with first-degree murder in the death of 2-year-old Lavontay White. Lavontay’s uncle, 26-year-old Lazaric Collins, also was killed in Tuesday’s shooting, which left a pregnant woman wounded. (Chicago Police Department via AP)

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This undated photo provided by the Chicago Police Department shows LaRoyce Tankson. Prosecutors have charged Tankson, an Amtrak police officer in the shooting death of a Minneapolis man outside Chicago's Union Station. The Cook County State's Attorney's office announced Friday Feb. 17, 2017, Tankson has been charged with first-degree murder in the Feb. 8 shooting of Chad Robertson, who died Wednesday. (Chicago Police Department via AP)

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This undated photo provided by The Chicago Police Department shows Antwan C. Jones. Chicago police said Wednesday Jan. 15, 2017 that Jones faces a first-degree murder charge in the killing of 11-year-old Takiya Holmes In Chicago. She was shot in the head over the weekend and died Tuesday. (Chicago Police Department via AP)

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FILE - In these undated file booking photos provided by the Chicago Police Department show, from left, Tesfaye Cooper, Brittany Covington, Tanishia Covington and Jordan Hill. The four are charged, with aggravated kidnapping and taking part in a hate crime after allegedly beating and taunting a white mentally disabled man that was captured by a cellphone camera and shown live on Facebook. They are scheduled to return to court Friday, Feb. 10, 2017 where they're expected to enter pleas in the case. (Chicago Police Department via AP File)

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This undated photo provided by the Chicago Police Department shows Vandetta Redwood. A federal jury returned a not guilty verdict Thursday, Jan, 26, 2017 for Redwood, who was accused of supplying her teenage cousin with a gun authorities say the girl used to kill a 14-year-old rival after a Facebook feud over a boy in Chicago in 2014. (Chicago Police Department via AP)

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This booking photo provided by the Chicago Police Department shows Larrinita Starks, who has been charged with child endangerment after her 5-year-old daughter accidentally shot and wounded herself in the abdomen with a handgun that she found in her Stark's purse Tuesday night, Jan. 17, 2017. (Chicago Police department via AP)