THE BRONX - The premature baby of a woman killed after being hit by a van is in stable condition Friday after doctors delivered the newborn via emergency Cesarean section.Doctors at Saint Barnabas Hospital were able to deliver the 3-pound, 6-ounce baby boy just hours before the baby?s mother, 33-year-old Donnette Sanz, died.More than two dozen bystanders rushed to help Sanz after the 5-ton school bus crushed her during Thursday afternoon's accident. They lifted the bus so Sanz could be pulled free.?Everybody just came together, everybody just thought at once and it was like one mind - lift it,? said Chris Coleman, one of the bystanders who helped save Sanz.Sanz worked as a New York City traffic agent and was on her way to lunch when she was struck by a van that pushed her in front of the bus. The van was driven by 72-year-old Walter Walker, who claimed his brakes failed. Mechanical tests are being conducted to determine if brake failure took place at the time of the accident. Walker has been charged with criminally negligent homicide and aggravated unlicensed operation of a motor vehicle. Police say Walker, who previously had 20 driver?s license suspensions, should have never been on the road. Walker is set to be arraigned within the next week.