A teacher has been charged with first-degree cruelty to children after allegedly hitting a 4-year-old boy with a belt, Duluth police said.

Nadine Jones, 51, of Lawrenceville, turned herself in to police on April 8. She was fired from Childcare Network, the day care center where the incident allegedly took place.

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A father picked his 4-year-old son up from Childcare Network on March 26 and noticed the boy had bruising on his lower back, police said. The man asked his son if anything had happened, and the boy said a teacher had hit him with a belt.

The man immediately told the day care director about the incident. The next day, the day care director told the man that Jones was responsible for the incident and that she had been fired. The father filed a report with the Duluth Police Department on March 28.

After more than a week of investigation, investigators took out a warrant for Jones’ arrest on April 8. Jones voluntarily surrendered at the Gwinnett County Detention Center, where she was booked into jail. She was released on $5,700 bond five hours after booking.

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Gwinnett County police are searching for a masked gunman who robbed a Lawrenceville gas station off Duluth Highway early Saturday morning.