Chicago Police Officer Charged With Murder After Video Shows Him Shooting Laquan McDonald 16 Times; Eyewitness Recalls Shooting by Alleged White Supremacists at Minneapolis Black Lives Matter Protest; US Rep. Keith Ellison Demands Transparent, Aggressive Investigation of Police Killing of Jamar Clark; First Muslim Member of U.S. Congress: Restrictions on Syrian Refugees Driven by Fear, Xenophobia.