CALCASIEU PARISH, LA (KPLC) - Family members first found Gilmore dead inside her home Sunday afternoon, but investigators believe she was murdered sometime before Sunday.
Sheriff Tony Mancuso says a person of interest is already in custody.
"We feel strongly about this person," said Mancuso.
Mancuso says the person of interest knew the victim.
"This particular person of interest lived at this home from time to time," said Mancuso.
More than 24 hours later, lot 418 is still an active crime scene. Sheriff Mancuso says his officers and detectives will stay there as long as it takes to make sure every piece of evidence is collected.
"We're just going to keep methodically going through the house for anything else that we can find, maybe something we've missed," said Mancuso.
While authorities aren't saying who the person of interest is, Mancuso says they're in jail on charges that are not related to the murder.
"I believe that although he's in jail, he could have done this prior to him going to jail," said Mancuso.
While investigators are still trying to figure out what exactly happened, they're not getting help from the person of interest. The sheriff says he's not cooperating with law enforcement.
"When people don't cooperate and they don't want to talk, then the burden is completely on us," said Mancuso. "So therefore, we got to dot our "I"s and cross our "T"s. We don't want to make a mistake."
But he assures the community that his department will get to the bottom of the homicide soon.
"Nobody wants to bring closure to this more than we do," said Mancuso.
Mancuso hopes to know more details about the case as early as later this week. He says his department will release the information as they see fit, depending on the investigation.