She was taken to John Hunter Hospital for medical examination and later released.
"The identification of the car was one of the very key aspects of it but also the description provided by the very brave, young victim," Detective Superintendent John Kerlatec told reporters earlier.
"I don't know the motive or why someone would perpetrate this crime."
He said the family of the victim felt "some comfort" in knowing the man had been caught.
"They have some comfort knowing this person is now off the streets," he said.
"It's been a traumatic and very challenging few days. They were worried as everyone else was in the community."
Earlier in the week, Detective Chief Inspector Paul Jacob, from the sex crimes squad, said the girl was doing "remarkably well" given what she endured.
"I am very thankful we have a very brave young woman who has been able to help us so valuably in our continuing inquiry," he said.
A parent of a friend of the girl told The Daily Telegraph the community would rally around the "quiet polite little girl" and her family.
"I saw her yesterday get into the ambulance … she was just so distraught," she said.
"It's horrible, it's devastating to think a child has been treated like that."
The newspaper reported a spokeswoman for the NSW Education Department did not answer questions about whether the family was notified when the girl didn't show up for school.
The NSW Department of Education provided a letter for schools to give to parents and Kotara South Public School principal Susan Maxworthy said stranger danger talks had taken place in classrooms and assemblies.
A crime scene was established at Hudson Park and forensically examined, according to police
Detectives from State Crime Command's Child Abuse and Sex Crimes Squad and Newcastle City Police District have established Strike Force Bradly to investigate the incident.
Earlier in the week, they scoured the area for CCTV, seeking dashcam footage and sifted through bushland next to Belair Public School for clues to catch the predator.
