Investigators in Trenton arrested 18-year-old Zion Williams and two 16-year-olds.
All three have been charged with murder.
Wilma Rutledge and the 14-year-old were shot earlier this month at the intersection of Carver Lane and North Willow Street in Trenton.
Police have not release information about a possible motive, but had originally said the two victims were not the intended targets.
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