The Wake County Sheriff's Office told ABC11 Eyewitness News Friday that detectives are questioning David Green, III.
Officers discovered 51-year-old David Green, Jr.'s body in a freezer in his Raleigh home last week. He was reported missing on September 1.
Authorities arrested Green's live-in girlfriend, 41-year-old Wendy Edmond Green, and charged her with his murder.
The couple has two children, 17-year-old Alexis Green and 15-year-old David Green, III. Alexis was in the Wake County Jail when her father's body was discovered. She's serving time for a burglary and failure to appear in court.
Last week it was not immediately known where the couple's son was, but he was found in St. Paul earlier this week living with a friend.
Warrants released in the case revealed detectives suspect David Green, Jr. may have been murdered as far back as January. The warrants said he apparently died of severe injuries from unknown cutting instruments.
Wendy Green had apparently moved out of the house on Ray Road sometime after David was last seen.
Warrants also revealed authorities are seeking financial information related to credit cards belonging to the victim -- items that were allegedly found inside Wendy's purse when she was arrested. Two cell phones were also found inside her purse.
Authorities say the Greens had domestic and custody issues in the past, including an assault on Wendy Green in 2007. David Green, Jr. was arrested and charged in that incident. Court documents show Wendy sued for custody of the children and David Green wanted his name added to his daughter's birth certificate.
Wendy is currently in jail under no bond. Green's murder is still under investigation.