Tiffany Crutcher (C), sister of Terence Crutcher, the Tulsa motorist who was shot and killed by police, stands with attorney Benjamin Crump (L) during a news conference at the Reverend Al Sharpton's National Action Network headquarters in New York, U.S., September 21, 2016. REUTERS/Shannon Stapleton

A woman expresses her frustration toward the media at a press conference held at The Village at College Downs apartment complex the morning after the police shooting of Keith Scott, in Charlotte. REUTERS/Jason Miczek

Republican presidential nominee Donald Trump takes the stage to rally with supporters in Toledo, Ohio, U.S., September 21, 2016. REUTERS/Jonathan Ernst

Police officers wearing riot gear block a road during protests after police fatally shot Keith Lamont Scott in the parking lot of an apartment complex in Charlotte, North Carolina, U.S. September 20, 2016. REUTERS/Adam Rhew/Charlotte Magazine

Police officers wearing riot gear block a road during protests after police fatally shot Keith Lamont Scott in the parking lot of an apartment complex in Charlotte, North Carolina, U.S. September 20, 2016. REUTERS/Adam Rhew/Charlotte Magazine

Police officers wearing riot gear block a road during protests after police fatally shot Keith Lamont Scott in the parking lot of an apartment complex in Charlotte, North Carolina, U.S. September 20, 2016. REUTERS/Adam Rhew/Charlotte Magazine

The marquee sign at Caesars Palace hotel is seen on the strip in Las Vegas, Nevada, U.S. February 16, 2011. REUTERS/Steve Marcus/File Photo

(L-R) Reverend Joey Crutcher, father of the Tulsa motorist who was shot and killed by police Terence Crutcher, speaks while Rev. Al Sharpton, attorney Benjamin Crump and Tiffany Crutcher stand during a news conference a the National Action Network headquarters in New York, U.S., September 21, 2016. REUTERS/Shannon Stapleton