Attorneys representing the family of 4-year-old Ariel Russo planned a news conference Tuesday afternoon.
Ariel and her grandmother were walking on the Upper West Side when they were struck by an SUV that jumped a curb on June 4.
Ariel's grandmother remains hospitalized.
Seventeen-year-old Franklin Reyes is charged with vehicular manslaughter. He was driving with a learner's permit.
Ariel's mother, Sofia Russo, tells the Daily News that it took too long for an ambulance to reach her daughter.
The Fire Department blamed a four-minute delay on human error.
The city's Law Department did not immediately respond to a comment request.