Samuel Hoback, age 21, has been charged with the murder of 51-year-old Melanie Payne.
He is being held in Limestone County without bond.
Limestone County Sheriff Mike Blakely identified the victim as 51-year-old Melanie Payne of Prospect.
Blakely said Payne's friends discovered her dead at their home, which she was staying because of being scared of Hoback.
Hoback was released Monday afternoon from the Giles County Jail on a $6,500 bond for a burglary charge. He was also already out of jail on a separate $75,000 bond for attempted murder.
The Giles County sheriff did not confirm if either of those charges is connected to the case in Limestone County.
Hoback was also charged with possession of a controlled substance and a probation revocation on a theft charge in Limestone County. Blakely said Hoback had meth, and a handgun was found in his vehicle. He said they do not know if the gun is the one used in the deadly shooting.
According to Blakely, Payne was supposed to testify against Hoback at a bond revocation hearing on Tuesday in Giles County. He said she and Hoback had been acquaintances for some time, but they don't know the full extent of their relationship.
Authorities are interviewing family members and are still working to determine a motive. They are also working to determine if Hoback will be charged with murder or capital murder.
Blakely said they believe that after he shot the victim, he went back to his parents' home and changed clothes.
Hoback has quite a violent history, and authorities believe he acted alone in Tuesday's shooting.