12/07/2011 02:57 pm ET | Updated Dec 07, 2011

Ryan Brunn Arrested In Murder Of Jorelys Rivera, 7-Year-Old Georgia Girl

Investigators in Georgia have arrested a suspect in the death of 7-year-old Jorelys Rivera.

Ryan Brunn, 20, was cuffed and walked into Cherokee County Jail on suspicion of murder in the slaying of the Canton girl, who was found dead in a Dumpster after vanishing from a playground in her apartment complex on Friday.

Brunn was employed as a maintenance worker in the complex where the victim lived, Georgia Bureau of Investigation Director Vernon Keenan revealed at a news conference Wednesday afternoon.

"We are confident that Brunn is the killer and that is why he is in custody," said Keenan.

"This is a mammoth case," he added. "We believe that this horrendous crime was planned and calculated and we recovered a lot of evidence that's going to require processing."

Rivera was playing with friends under the supervision of her babysitter when the child left the playground to fetch drinks. She never returned.

Authorities believe the child was abducted at around 5 p.m., brought to a vacant apartment, sexually assaulted, stabbed and killed. An autopsy concluded that Rivera "died as a result of blunt force trauma to the head" about 60 to 90 minutes after she was kidnapped, Canton Patch reports.

So far, Brunn has been charged only with Rivera's murder, though Keenan said the district attorney's office will bring "additional charges" against the suspect "in the near future."

"We are investigating all of the past history of Ryan Brunn and are piecing together what he has been doing for the past several years," Keenan added.

In a press conference Tuesday, Keenan told reporters that whoever was responsible for the girl's death likely lived in the same apartment complex as the victim or had access to the building.

Neighbors told WSBTV that investigators have searched the suspect's apartment and removed his car. Some said they were suspicious of Brunn.

"Everybody in here gets a bad vibe from him," one neighbor told the station.