CHICAGO (AP) — A 14-year-old Chicago girl accused of killing another girl in a dispute over a boy tried unsuccessfully to fire a gun before someone fixed it for her and handed it back to her so she could open fire, prosecutors said Tuesday. The alleged shooter appeared at the hearing on a first-degree murder charge in Monday's slaying of 14-year-old Endia Martin. According to prosecutors, the suspect went to a residence in the Back of the Yards neighborhood on the city's South Side around 4:30 Monday afternoon to continue a fight that began on Facebook.