Casey Jones, 32, and her children, who range in age from 1 to 10 years, were last seen about six weeks ago in the Ocala, Florida area, the sheriff's office said. Her family reported they were missing Saturday night, police said.
On Monday, her body was found near Brantley County in southeast Georgia, about 150 miles north of his last known address in Florida, the sheriff's office said.
Jones' husband, Michael Wayne Jones, Jr., 38, was stationed by police in Bruntley County after a car accident, Woods said. Casey Jones' remains were found in the vehicle he was driving, and he later led detectives to the remains of four children, authorities said.
Investigators believe he killed them and kept their bodies for several weeks before driving them to Brantley County, Georgia.
An arrest warrant has been issued for his second-degree murder in Florida and more charges can be filed, police said.
"The real evil is popping its head here in Marion County," Woods said, "This is the single best way to describe it."