Chicago officer pleads not guilty to murder charges

CHICAGO (AP) — A white Chicago police officer who shot a black teenager 16 times has pleaded not guilty to murder charges.
Jason Van Dyke appeared in Cook County Criminal court Tuesday in Chicago.
Prosecutors announced last month they were charging Van Dyke with six counts of murder for the 2014 shooting of 17-year-old Laquan McDonald.
Hours later, the city released squad car video of the shooting in which McDonald is seen veering away from Van Dyke before the veteran officer opens fi