Police responding to a single-vehicle crash in Brantley County, Georgia, on Sunday made the grisly discovery that the 38-year-old driver was hiding his wife's body in the back of the van, just one day after relatives reported her and her four children missing in Florida.

Detectives say 32-year-old Casei Jones of Summerfield, Florida, had been dead for several weeks.

"Go ahead and arrest me, my wife's body is in the back," Michael Wayne Jones told the Georgia police officers at the crash scene, according to Sgt. Paul Bloom of the Marion County Sheriff's Office.

Police believe Casei Jones and her four children Cameron Bowers, 10, Preston Bowers, 5, Mercalli Jones, 2, and Aiyana Jones, 1, were killed weeks ago. Photo / Supplied
Police believe Casei Jones and her four children Cameron Bowers, 10, Preston Bowers, 5, Mercalli Jones, 2, and Aiyana Jones, 1, were killed weeks ago. Photo / Supplied

After the crash, Michael Jones led Georgia police to a nearby wooded area where they found four more bodies. Police have yet to identify them officially, but based on crime scene evidence and interviews, the bodies are believed to be those of Casei Jones' children, two of whom she had with Jones: Cameron Bowers, 10; Preston Bowers, 5; Mercalli Jones, 2; and Aiyana Jones, 1.

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Jones was arrested and charged with second-degree murder in his wife's killing.

Police suspect Jones killed his family about 273km away, in their Florida home. That's where investigators said Jones probably kept their bodies for about three weeks before he put them in his van, where they remained for several weeks more.

At a Monday news conference, Marion County Sheriff Billy Woods grew emotional at times and called the news both heartbreaking and infuriating.

"All we need to know is that's evil. And evil did something. And evil needs to pay for what he did," Woods said in reference to Jones.

Police discovered Casei Jones' body in the back of her Michael Jones' van. Photo / Supplied
Police discovered Casei Jones' body in the back of her Michael Jones' van. Photo / Supplied

The discovery of the bodies is a grim conclusion to the weeks of worry by Jones' family. According to a spokeswoman for the Marion County Sheriff's Office, Casei Jones' mother, Nikki Jones, told police that she had not seen or heard from her daughter or her grandkids in about six weeks and was concerned that Michael Jones had done something to his family.

"The red flag, which for anybody that knew Casei, was when she didn't post anything [to Facebook] for her son's birthday," Sarah Gilbert, Jones's sister, told ABC 9 in Florida.

Relatives reported Casei and the children missing Saturday, prompting Marion County sheriff's deputies to visit the family's home in Summerfield. There, the well-being check turned into a crime scene discovery: Police observed that the home looked as if it had been vacant for "several weeks," and once the landlord let them inside, they described smelling the "odor of decomposition."

The search warrant for the home was being executed in Florida around the same time Jones was caught.

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Though the bodies of Casei Jones and her children have been found, Bloom said more questions remain; he notes that Michael Jones had no previous record and that there had been no prior calls to the family home.

The slayings, meanwhile, have shocked the town.

"Everyone in the community is trying to make sense of something that's senseless," Bloom said. He noted that one of the lead detectives in the sheriff's department celebrates his 31st year on the job this week. "[That detective] said this is the worst he's seen."