Panola County Sheriff detectives and the Mississippi Bureau of Investigation worked late into the evening Wednesday in the Jessica Chambers murder case interviewing those in connection to her and looking for a lead.
The sheriff's office and MBI investigators have been putting in over 12 hours a day since her gruesome discovery Dec. 6.
"We've got more footwork to do. We have more people to interview. You can't be wrong. You have to be right," Sheriff Dennis Darby said earlier Wednesday.
Chambers died after she was found badly burned along the side of a road.
Surveillance video obtained by FOX13 News on Tuesday shows the 19-year-old at Courtland convenience store and gas station less than two hours before she was set on fire and found barely alive near her burning car the evening of Dec. 6.
Convenience store manager Ali Fadhel said Ms. Chambers came in frequently. He told The Associated Press Wednesday that nothing seemed wrong, although Chambers bought more gas than usual.
About 90 minutes later, firefighters found her on a road a few miles away. Assistant District Attorney Jay Hale says Chambers spoke to firefighters about what happened, and authorities are investigating those leads. She died at a hospital.
Panola County Sheriff employee Ben Chambers said he is still grieving and calling for the public's help in coming forward with any information that will help solve his daughter's fiery murder.
The doctor told us in Memphis that they had squirted stuff in her mouth and she was burned so much deep down," Chambers said. Four days after her tragic death, the investigation is becoming more structured and that more information from Jessica's cellphone is adding to the investigation.
Family members also spoke at length as law enforcement continued their investigation.
Jessica's mother Lisa Chambers said that she is certain her daughter knew her killer or killers. She has also said that she thinks her daughter's spirit will guide someone to her killer.
"Because she is here, she can't rest," Lisa Chamber said. "She knows who did this and she has told who did this. She is here with me."
Family members say they plan to bring flowers and a cross to the site of Jessica's murder, a place where they have yet to visit. They don't have the heart to just yet.
Jessica's grandmother Willie Beardain says that she forgives whoever killed her granddaughter.
"Yes I can honestly say that I forgive them but I want to see justice served because they did this to Jessica," Beardain said. "They could do it to somebody else, but the Lord will definitely take this that is bad and make something good come out of it."
There have been no arrests in the case. Investigators have said more and more tips and leads have also come in.
© 2018 Cox Media Group.