Keyner Roman Vazquez de Leon was arrested and charged with aggravated manslaughter of a child under 18, leaving a child under six unattended in a motor vehicle resulting in bodily harm, and child neglect causing great bodily harm. A judge denied his bond during a court appearance Monday.

Officers were called to a home on Saturday after reports that the toddler had been left alone in a vehicle for roughly eight hours, police said. Fire rescue crews were already on scene providing emergency assistance when officers arrived, but the child was pronounced dead, according to an arrest report.

Investigators said Vazquez de Leon had been taking the girl from her home to a babysitter's home Monday through Saturday for about a year, a routine that also included driving another person to work. He and the child are not related.

On the morning of the incident, the report said, he followed that routine: he picked up the child from her home and then picked up and dropped off the other person at their job. He then returned to his own home with the child still in the car, turned off the vehicle and went inside, leaving her alone, according to the report.

At around 9 a.m., the report said, Vazquez de Leon was washing cars outside his home while the child remained inside the vehicle. About six hours later, the child's mother called to ask where her daughter was, and he realized he had left her in the car, the report said.

He went to check on the child, found her unresponsive, carried the car seat with her inside to his home and called emergency services, according to the report. He was then taken into custody.

Neighbors who spoke with local media said they had known him for about three years and described him as someone who regularly drove children to school.

"He normally takes kids to school," neighbor Berlin Vasquez said. "Yesterday, he was taking care of baby basically 2 years old, and he forgot. Eight hours inside a car and he forgot."

One neighbor said the child's mother went to the daycare, could not find her daughter and called the man to ask where she was. The neighbor said he apologized and was already outside the home with authorities when they arrived.

"I really don't know much about it," Vasquez said. "How he could forget? I guess he had too many things going on and he forgot."

The death has shaken other parents in the neighborhood, several of whom said they are now reconsidering the trust they place in caregivers.

"It's very painful," one mother said. "We have our kids, we leave them with someone to take care of them, and now we don't have that confidence to do so."

The case adds to a grim pattern of child hot-car deaths that safety advocates say is preventable through reminders, check-back habits and technology. The circumstances remain under investigation.