Marsha Williams turned herself into police Tuesday evening.
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She was charged with leaving the scene of a collision resulting in injury and failure to report a collision resulting in injury. She was released on her own recognizance.
Last week, police released surveillance video of the suspect vehicle.
VIDEO: Surveillance video released in Del. hit-and-run
Detectives were able to locate the vehicle and subsequently determined Williams was driving it when she struck 12-year-old Bryan Richards.
New Castle County Police say it was about 5:40 p.m. last Monday when Richards was struck by the hit-and-run driver as he attempted to cross the unit block of Memorial Drive, just off Route 13 in Minquadale, Delaware.
He was taken to A.I. DuPont Hospital for Children in guarded, but stable condition with multiple, severe injuries.
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Action News spoke with Bryan's mother Sheena Kanich last week.
"It's Christmas time. I have a 12-year-old boy in the hospital at Christmas time, and that's gonna be hard," Kanich said.
Bryan's mom says he faces a long road of surgeries, and will probably remain hospitalized at least until January.