Police are looking for the suspect and trying to track down more information. Upper Darby police Superintendent Michael Chitwood said it appears the girl was driven or walked to the playground. Investigators are trying to track down surveillance footage from the area.
"We believe that the little girl was dumped here," Chitwood said.
Fernando Gallard, a spokesman for the school district, said the district is investigating. Under the school's policy, he said, the woman should have signed in at the door and then gone straight to the office — not the classroom. "The exchange does not happen at the classroom level," he said.
The district is investigating and reviewing its policies with school employees, Gallard said.
Myers, the rescuer, was on his way to work when he heard the girl's cries, and his thoughts turned to his own 5-year-old daughter.
"I just wanted to do the same thing someone would do for my child," he said.
Mayoral spokesman Mark McDonald said in a Twitter post on Tuesday night that Myers would receive the full $10,000 reward posted for information leading to the girl's return.
McDonald said Mayor Michael Nutter praised Myers for his "sharp eye" and "quick thinking" when he discovered the girl in the park.
"Community policing is doing right when (you) see something wrong," McDonald said.
Associated Press writer Kathy Matheson contributed to this story.