The driver has been arrested in the case against a day care worker accused of leaving a 3-year-old boy in a hot van.

Deborah St. Charles, 51, was charged with aggravated manslaughter of a child by culpable negligence.

Police believe Myles Hill died after spending nearly 12 hours in the Little Miracles Academy van on Monday. A medical examiner report shows Hill died of "hyperthermia due to environmental exposure."

According to the arrest affidavit, St. Charles picked up Hill and some other children Monday. The affidavit says when she got to Little Miracles Academy #2, she removed cleaning supplies from the van, handed it to some of the children and closed up the van. The report says St. Charles admits she did not do a head count to make sure everyone left the van. 

The report says she then drove to the other Little Miracles Academy location, and parked the van. She then took a phone call, grabbed some personal items and shut and locked the van without checking it. 

Orlando police say logs for the van show St. Charles noted the pick-up time for Myles Hill, but no signature from St. Charles or another day care employee verifying that Hill left the van or that the vehicle was checked to make sure everyone was out of the vehicle, which is required by state law.

Orlando police investigators conducted a simulation to see how high the temperatures inside the van reached that day. According to the simulation, the inside of the van likely reached up to 144 degrees that day.

Day care shut down

The Florida Department of Children and Families (DCF) shut down Little Miracles Academy and its second location on Wednesday. The department stated that prior violations, along with the tragic events from Monday, are behind the decision.

“Trust me, that if I ever open back up. It won’t ever happen again, it won’t happen again,” said Audrey Thornton, the owner of Little Miracles Academy.

On Wednesday, Thornton spoke to reporters for the first time since the tragedy.

“I loved Myles and I took care of Myles since he was a baby,” said Thornton. “And if you all could forgive me, I am so sorry.”

Thornton fired St. Charles, but would not say much more about her.

At the day care Wednesday, we asked a worker, who would not identify herself, about the center’s procedures.

“The rules of the day care we follow,” she said. “(Thornton) preached to us every day about the rules.”

Myles’ aunt Chiquerria Banks wanted stiff charges to be filed.

“This is murder. This is not child neglect, this is murder,” Banks said.

DCF is still determining if and when the day care centers can reopen.

For now, they are helping parents find other child care services.