Laquan McDonald's great-uncle Marvin speaks to reporters after former Chicago police officer Jason Van Dyke was sentenced to 6 3/4 years in prison for the fatal shooting of 17-year-old Laquan McDonald at the Leighton Criminal Courts Building in Chicago, Illinois, U.S., January 18, 2019. REUTERS/Joshua Lott 

Laquan McDonald's great-uncle Marvin speaks to reporters after former Chicago police officer Jason Van Dyke was sentenced to 6 3/4 years in prison for the fatal shooting of 17-year-old Laquan McDonald at the Leighton Criminal Courts Building in Chicago, Illinois, U.S., January 18, 2019. REUTERS/Joshua Lott 

Activist William Calloway speaks to reporters after former Chicago police officer Jason Van Dyke was sentenced to 6 3/4 years in prison for the fatal shooting of 17-year-old Laquan McDonald at the Leighton Criminal Courts Building in Chicago, Illinois, U.S., January 18, 2019. REUTERS/Joshua Lott 

Activist William Calloway (C) speaks to reporters after former Chicago police officer Jason Van Dyke was sentenced to 6 3/4 years in prison for the fatal shooting of 17-year-old Laquan McDonald at the Leighton Criminal Courts Building in Chicago, Illinois, U.S., January 18, 2019. REUTERS/Joshua Lott 

Activist William Calloway speaks to reporters after former Chicago police officer Jason Van Dyke was sentenced to 6 3/4 years in prison for the fatal shooting of 17-year-old Laquan McDonald at the Leighton Criminal Courts Building in Chicago, Illinois, U.S., January 18, 2019. REUTERS/Joshua Lott 

Tiffany Van Dyke, wife of former Chicago police officer Jason Van Dyke, leaves the the Leighton Criminal Courts Building after her husband was sentenced to 6 3/4 years in prison for the fatal shooting of 17-year-old Laquan McDonald in Chicago, Illinois, U.S., January 18, 2019. REUTERS/Joshua Lott 

Tiffany Van Dyke (C), wife of former Chicago police officer Jason Van Dyke, leaves the the Leighton Criminal Courts Building after her husband was sentenced to 6 3/4 years in prison for the fatal shooting of 17-year-old Laquan McDonald in Chicago, Illinois, U.S., January 18, 2019. REUTERS/Joshua Lott 

Tiffany Van Dyke (C), wife of former Chicago police officer Jason Van Dyke, leaves the the Leighton Criminal Courts Building after her husband was sentenced to 6 3/4 years in prison for the fatal shooting of 17-year-old Laquan McDonald in Chicago, Illinois, U.S., January 18, 2019. REUTERS/Joshua Lott 

Owen Van Dyke, father of former Chicago police officer Jason Van Dyke, attends the sentencing of his son, who was found guilty in the fatal shooting of Laquan McDonald at the Leighton Criminal Courts Building in Chicago, Illinois, U.S., January 18, 2019. REUTERS/Joshua Lott 

Tiffany Van Dyke, wife of former Chicago police officer Jason Van Dyke, attends the sentencing of her husband, was found guilty in the fatal shooting of Laquan McDonald at the Leighton Criminal Courts Building in Chicago, Illinois, U.S., January 18, 2019. REUTERS/Joshua Lott 

Daniel Herbert, attorney for former Chicago police officer Jason Van Dyke, attends Van Dyke's sentencing for the fatal shooting of Laquan McDonald at the Leighton Criminal Courts Building in Chicago, Illinois, U.S., January 18, 2019. REUTERS/Joshua Lott 

Kevin Graham, President of Fraternal Order of Police Chicago Lodge 7 (C), attends Jason Van Dyke sentencing for the fatal of shooting of Laquan McDonald at the Leighton Criminal Courts Building in Chicago, Illinois, U.S., January 18, 2019. REUTERS/Joshua Lott 

Laquan McDonald's great-uncle Marvin Hunter speaks to reporters as he attends the sentencing for former Chicago police officer Jason Van Dyke, who was found guilty in the fatal shooting of Laquan McDonald at the Leighton Criminal Courts Building in Chicago, Illinois, U.S., January 18, 2019. REUTERS/Joshua Lott 

Owen Van Dyke, father of former Chicago police officer Jason Van Dyke, attends the sentencing of his son, who was found guilty in the fatal shooting of Laquan McDonald at the Leighton Criminal Courts Building in Chicago, Illinois, U.S., January 18, 2019. REUTERS/Joshua Lott 

Owen Van Dyke, father of former Chicago police officer Jason Van Dyke, attends the sentencing of his son, who was found guilty in the fatal shooting of Laquan McDonald at the Leighton Criminal Courts Building in Chicago, Illinois, U.S., January 18, 2019. REUTERS/Joshua Lott 

Tiffany Van Dyke, wife of former Chicago police officer Jason Van Dyke, attends the sentencing of her husband, was found guilty in the fatal shooting of Laquan McDonald at the Leighton Criminal Courts Building in Chicago, Illinois, U.S., January 18, 2019. REUTERS/Joshua Lott 

A protester walks past Chicago police officers during the sentencing for Jason Van Dyke for the fatal shooting of Laquan McDonald at the Leighton Criminal Courts Building in Chicago, Illinois, U.S., January 18, 2019. REUTERS/Joshua Lott 

Chicago police Officer Jason Van Dyke is lead away after his guilty verdict in his murder trial in the shooting death of Laquan McDonald, in Chicago, Illinois, U.S., October 5, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police Officer Jason Van Dyke is lead away after his guilty verdict in his murder trial in the shooting death of Laquan McDonald, in Chicago, Illinois, U.S., October 5, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police Officer Jason Van Dyke is lead away after his guilty verdict in his murder trial in the shooting death of Laquan McDonald, in Chicago, Illinois, U.S., October 5, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police Officer Jason Van Dyke (R), is lead away after his guilty verdict in his murder trial in the shooting death of Laquan McDonald, in Chicago, Illinois, U.S., October 5, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police Officer Jason Van Dyke (R), is lead away after his guilty verdict in his murder trial in the shooting death of Laquan McDonald, in Chicago, Illinois, U.S., October 5, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke (L), reacts to his guilty verdict, as his attorney Daniel Herbert looks on during his trial for the shooting death of Laquan McDonald, in Chicago, Illinois, U.S., October 5, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police Officer Jason Van Dyke is lead away after his guilty verdict in his murder trial in the shooting death of Laquan McDonald, in Chicago, Illinois, U.S., October 5, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police Officer Jason Van Dyke is lead away after his guilty verdict in his murder trial in the shooting death of Laquan McDonald, in Chicago, Illinois, U.S., October 5, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke (L), reacts to his guilty verdict, as his attorney Daniel Herbert looks on during his trial for the shooting death of Laquan McDonald, in Chicago, Illinois, U.S., October 5, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke (L), reacts to his guilty verdict during his trial for the shooting death of Laquan McDonald, in Chicago, Illinois, U.S., October 5, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke (L), reacts to his guilty verdict, as his attorney Daniel Herbert looks on during his trial for the shooting death of Laquan McDonald, in Chicago, Illinois, U.S., October 5, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke looks as the jury sends a question to Judge Vincent Gaughan (not shown) during deliberations in Van Dyke's murder trial of 17-year old Laquan McDonald, in Chicago, Illinois, U.S., October 5, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police Officer Jason Van Dyke watches the prosecution's closing statements during his trial for the shooting death of Laquan McDonald at the Leighton Criminal Court Building in Chicago, Illinois, U.S., October 4, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Police Officer Jason Van Dyke flanked by his attorneys Tammy Wendt and Elizabeth Fleming listen to closing statements at his trial for the shooting death of Laquan McDonald at the Leighton Criminal Court Building in Chicago, Illinois, U.S., October 4, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police Officer Jason Van Dyke watches the prosecution's closing statements during his trial for the shooting death of Laquan McDonald at the Leighton Criminal Court Building in Chicago, Illinois, U.S., October 4, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police Officer Jason Van Dyke stands with his attorneys during his murder trial in the shooting death of Laquan McDonald, in Chicago, Illinois, October 3, 2018. REUTERS/John J. Kim/Chicago Tribune/Pool via REUTERS 

Chicago police Officer Jason Van Dyke looks on during his murder trial as a monitor displays a scene from a police vehicle dash cam video, moments after the shooting death of Laquan McDonald, in Chicago, Illinois, October 3, 2018. REUTERS/John J. Kim/Chicago Tribune/Pool via REUTERS 

Chicago police Officer Jason Van Dyke attends his trial in the shooting death of Laquan McDonald, in Chicago, Illinois, October 3, 2018. REUTERS/John J. Kim/Chicago Tribune/Pool via REUTERS 

Chicago police Officer Jason Van Dyke takes the stand in his murder trial for the shooting death of Laquan McDonald at the Leighton Criminal Court Building in Chicago, Illinois, U.S., October 2, 2018. Antonio Perez/Pool via Reuters 

Chicago police Officer Jason Van Dyke takes the stand in his murder trial for the shooting death of Laquan McDonald at the Leighton Criminal Court Building in Chicago, Illinois, U.S., October 2, 2018. Antonio Perez/Pool via Reuters 

Chicago police Officer Jason Van Dyke takes the stand in his murder trial for the shooting death of Laquan McDonald at the Leighton Criminal Court Building in Chicago, Illinois, U.S., October 2, 2018. Antonio Perez/Pool via Reuters 

Chicago police Officer Jason Van Dyke listens as he sits behind a large monitor during his murder trial for the shooting death of Laquan McDonald, at the Leighton Criminal Court Building, in Chicago, Illinois, U.S., September 27, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police Officer Jason Van Dyke listens during his murder trial for the shooting death of Laquan McDonald, at the Leighton Criminal Court Building, in Chicago, Illinois, U.S., September 27, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke listens during his trial for the shooting death of Laquan McDonald at the Leighton Criminal Court Building, in Chicago, Illinois, U.S., September 25, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke listens during his trial for the shooting death of Laquan McDonald at the Leighton Criminal Court Building, in Chicago, Illinois, U.S., September 25, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke looks at a video monitor on the right while another monitor shows a demonstrative video to the jury during his murder trial for the shooting death of Laquan McDonald, at the Leighton Criminal Court Building, in Chicago, Illinois, U.S., September 25, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke looks at a video monitor on the right while another monitor shows a demonstrative video to the jury during his trial for the shooting death of Laquan McDonald at the Leighton Criminal Court Building, in Chicago, Illinois, U.S., September 25, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke buttons up his jacket while heading toward the judge's bench at the start of his murder trial for the shooting death of Laquan McDonald at the Leighton Criminal Court Building, in Chicago, Illinois, U.S., September 25, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke listens to testimony during his trial for the shooting death of Laquan McDonald at the Leighton Criminal Court Building, in Chicago, Illinois, U.S., September 25, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke listens to testimony during his trial for the shooting death of Laquan McDonald at the Leighton Criminal Court Building, in Chicago, Illinois, U.S., September 25, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke leans over and listens to his attorney Tammy Wendt during his trial for the shooting death of Laquan McDonald at the Leighton Criminal Court Building, in Chicago, Illinois, U.S., September 25, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke listens in, during his murder trial for the shooting death of Laquan McDonald, at the Leighton Criminal Court Building in Chicago, Illinois, U.S., September 24, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke listens in, during his murder trial for the shooting death of Laquan McDonald, at the Leighton Criminal Court Building in Chicago, Illinois, U.S., September 24, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke listens in, during his murder trial for the shooting death of Laquan McDonald, at the Leighton Criminal Court Building in Chicago, Illinois, U.S., September 24, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke listens in, during his murder trial for the shooting death of Laquan McDonald, at the Leighton Criminal Court Building in Chicago, Illinois, U.S., September 24, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke walks toward the judge's bench, during his murder trial for the shooting death of Laquan McDonald, at the Leighton Criminal Court Building in Chicago, Illinois, U.S., September 24, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke listens in, during his murder trial for the shooting death of Laquan McDonald, at the Leighton Criminal Court Building in Chicago, Illinois, U.S., September 24, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke listens in during his trial for the shooting death of Laquan McDonald at the Leighton Criminal Court Building in Chicago, Illinois, U.S., September 20, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Everyone in the court stands before the entrance of the jury during the trial of Chicago police officer Jason Van Dyke (L), for the shooting death of Laquan McDonald, at the Leighton Criminal Court Building in Chicago, Illinois, U.S., September 20, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke looks on as attorney Daniel Herbert speaks out during the trial of Van Dyke for the shooting death of Laquan McDonald at the Leighton Criminal Court Building in Chicago, Illinois, U.S., September 20, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke listens in during his trial for the shooting death of Laquan McDonald at the Leighton Criminal Court Building in Chicago, Illinois, U.S., September 20, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Chicago police officer Jason Van Dyke (L), converses with his attorneys during his trial for the shooting death of Laquan McDonald at the Leighton Criminal Court Building in Chicago, Illinois, U.S., September 20, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS 

Rev. Jesse Jackson (L), and Laquan McDonald's mother Tina Hunter listen in during the trial of Chicago police officer Jason Van Dyke for the shooting death of Laquan McDonald at the Leighton Criminal Court Building in Chicago, Illinois, U.S., September 20, 2018. Antonio Perez/Chicago Tribune/Pool via REUTERS