Robert Pasco III is accused of shooting his girlfriend, Edith Castrejon in Portage Park last month.
She was six months pregnant at the time. The baby died a week later.
Pasco was previously charged with unlawful use of a weapon.
He is now charged with felony involuntary manslaughter as well as a felony charge for the baby's death.
He is also facing three counts of child endangerment, since three other children were in the home at the time but were not hurt.
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