Chicago prosecutor asks for FBI’s help investigating double fatal police shooting

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CHICAGO — Cook County State's Attorney Anita Alvarez says she has asked the FBI for its help investigating a double fatal shooting by Chicago police.

Alvarez said Thursday that the shooting "demands a very deliberate and meticulous independent investigation." Chicago police say an officer on Saturday fatally shot 55-year-old Bettie Jones, who police said was shot accidentally, and 19-year-old Quintonio LeGrier.

The request comes as city officials face increased scrutiny over police shootings. Earlier Thursday, the Chicago mayor's administration released hundreds of emails related to a recently released video that shows an officer shooting a black teenager 16 times in October 2014.

The city's main police oversight agency, the Independent Police Review Authority, is investigating the weekend shooting. Alvarez urged the agency to perform a thorough investigation. She said her office will review the results and determine if criminal charges are warranted.