From the article:
Police tell FOX 8 News that the boy was walking down Bundy from Chef Menteur Highway when he passed the perpetrator. For some reason, the perp fired a gun at the boy, who was wounded behind his left knee.
A friend transported the victim to Lake Forest and Crowder Blvds., where they spotted a police officer around 8:17 p.m. The office called EMS, which transported the boy to a local hospital. He was last reported in stable condition.
Investigators have not named a suspect or a motive for the shooting..