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The families of two people shot to death by Chicago police officers are calling for a federal investigation into the cases.

Jamaal Moore, 23, was shot twice in the back by police in December, 2012 on 55th and Ashland after a police chase.

His family has filed a wrongful death lawsuit that goes to trial in March.

In the other case, 17- year-old Christian Green was shot – also in back – on the 4th of July of this year while walking with friends near 56th and State.

Green’s family filed a wrongful death lawsuit Wednesday.

The mothers and their attorneys say neither victim had a weapon when they were shot.

They want U.S. Attorney Zachary Fardon to fully investigate the matter.

They questioned whether the Chicago Police Department is capable of properly investigating their own.

They say the U.S. attorney’s office could provide more objective information.

The Cook County Medical Examiner ruled both deaths a homicide.