The Daily Herald reports that 18 year old Diamond Davis, jailed since August, could get out in half the time with good behavior.
RELATED: Murder charges dropped against 5 teens accused in north suburban attempted car theft
She pleaded guilty to trying to steal a car in Old Mill Creek in Lake County, Illinois. The car's owner fired at the teenagers and a 14-year-old, Diamond's cousin, was killed.
Prosecutors had initially charged Davis and four other teens with murder for the 14-year-old's death, but the charges were later dropped.