A vigil was held at Challenge Charter School, where the fifth grader was set to graduate.
Justin was shot in the stomach outside a relative's home Saturday, just days before his 11th birthday.
His mother, Aretha Wallace, held back tears while speaking about her beloved son.
"He's my angel. Somehow he's looking over me," she said. "Justin loved his school, he loved his family, and he loved his friends. Anyone who knew him could have tell."
The suspect, 29-year-old Jovan Young, was arraigned Wednesday on murder charges.
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