Joseph "Lil JoJo" Coleman was a teen rapper.

Chicago rapper Lil JoJo, whose real name was Joseph Coleman, was shot and killed Sept. 4. | Family photo

Robin Russell holds a photo of her son Joseph Coleman (in Sox hat) and his little brother and sister. Joseph Coleman was shot and killed Tuesday evening. | Tom Cruze~Sun-Times

A memorial marks near the spot where 18-year-old Joseph Coleman was shot and killed.

Blood marks the spot where 18-year-old Joseph Coleman was shot and killed Tuesday night about 7:30pm.

Robin Russell holds a photo of her son Joseph Coleman (in Sox hat) and his little brother and sister. Joseph Coleman was shot and killed Tuesday evening. | Tom Cruze~Sun-Times

Joseph Coleman (Lil JoJo) was shot and killed Tuesday night. | Family provided photo