The shooting happened in the 6700 block of Alpine Street in District Heights around 6:20 p.m. on Wednesday, May 4, police said.
The video shows two vehicles stopping in the street near a group of people sitting near the road then firing shots.
The child and teenager were said to have sustained non-life-threatening injuries but a dog killed in the gunfire, police said.
The investigation is ongoing. Anyone with information is asked to contact Crime Solvers at 1-866-411-TIPS (8477) online at pgcrimesolvers.com. The case number is 22-0021462.
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