A mother and her boyfriend will remain behind bars without bond in Rhea County. They're accused of murdering her young son last week.

Jessica Robbins and Bradley Adcox went before a judge Friday. They're both charged with first degree murder and aggravated child abuse in the death of Robbins' son, 5-year-old Landon Robbins.

Friday marked one week since 5-year-old Landon was found dead in his Spring City home. His mother, 24-year-old Jessica Robbins and her boyfriend, 22-year-old Bradley Adcox went before a judge Friday for arraignment inside the Rhea County Jail.

Judge James Mckenzie reviewed the felony charges with Robbins and Adcox.

READ MORE | Detectives: Rhea County child's death worst case of child abuse seen

"You're charged with aggravated child abuse, neglect, endangerment with a child under eight and first degree murder," Judge Mckenzie said to Adcox.

Neither appeared emotional, just kept their heads down through most of the arraignment process, and spoke quietly.

READ MORE | Funeral plans for Landon Robbins

"Do you understand what you're charged with," Judge Mckenzie asked Robbins. She said yes.

Both were appointed public defenders and scheduled for a preliminary hearing September 18th. The judge did not discuss the option of setting bond, so they'll stay right where they are.

"Anybody that would take a poor little innocent 5-year-old boy and do the things they did to him, there's no forgiveness for that kind of people," Landon's grandfather said.

Landon's biological dad and granddad are planning a candlelight vigil in his memory Friday night in Roane County, one week since he was found dead inside a camper-home in Spring City.

"He loved to play and he loved to laugh," Landon's dad, Gerald Wells said.

Rhea County detectives say Jessica Robbins called 911 last Friday, saying her little boy wasn't breathing and her CPR attempts didn't work. First responders found Landon lying unresponsive on a make shift bed in the living room.

READ MORE | Mother and boyfriend charged in death of 5-year old Rhea County boy

Robbins and her three children had just moved in with Adcox a few weeks earlier. The couple claimed Landon's injuries were from falling into a swing set in the yard the night before. Detectives say many injuries were not consistent with that story. They say the preliminary autopsy lists the cause of death as blunt force trauma.

"We haven't had anything like this though. I've been child abuse investigator since Sheriff Neal took over in 2002, and this is the worst one I've had to work," Rhea County Detective Rocky Potter said.

Robbins' other two children were placed with family members.   

Channel 3 did speak with Bradley Adcox's family outside the jail Friday. They were very upset the judge didn't allow them inside for the proceedings.

Stay with Channel 3 for developments on this case.