Jessica Chambers’ dad is said to be frustrated that no one seems to know who set his daughter on fire and killed her.

According to the Associated Press, Ben Chambers, who works for the sheriff’s department, said he is being told by his colleagues to steer clear of the area where the investigators are working.

“They don’t want me to see the evidence up there. I understand their point too, they’re looking out for my benefit,” he said. “They don’t want me to see things that bring back memories, or see something that maybe I’ll think someone had something to do with it and I’ll go do something to some innocent person. They’re doing everything by the book when it comes to me.”

On Dec. 6, Jessica Chambers, 19, was covered in a flammable liquid and set on fire. She later died from burns that covered more than 98 percent of her body.

Jessica's dad to killer: "They're coming for you". http://t.co/ziF6HYEf8J #JusticeforJessica via @TRex21 pic.twitter.com/tib6qY2GMT

— The Clarion-Ledger (@clarionledger) December 17, 2014

Investigators are continuing to follow leads, including reports that it is gang-related, and the results of DNA evidence and fire analysis.

“They’ve questioned people that normally know everything about everything, and nobody seems to know anything about this, that’s what’s so amazing and unbelievable,” he said.

Panola County Sheriff Dennis Darby told The Clarion-Ledger that investigators are getting close to identifying “possible people of interest that could lead us somewhere better than where we are.”

CONTINUING COVERAGE: Investigators follow new lead in Jessica Chambers murder case http://t.co/8mjUTnleeF pic.twitter.com/ld23QiC4Fq

— WLBT 3 On Your Side (@WLBT) December 17, 2014

Investigators from several agencies — which include the Mississippi Bureau of Investigation, the State Fire Marshal’s office, the FBI, the federal Bureau of Alcohol, Tobacco and Firearms and the U.S. Marshals Service — are currently comparing reports and going back to talk to people who have given conflicting accounts, he said.

No one is taking a break during the Christmas holiday. Instead, they are “doing shifts,” Ben Chambers told The Commercial Appeal.

The award for information leading to the arrest of the perpetrator, or perpetrators, grew Monday to $17,800, and more is expected soon, Darby said.

Ben Chambers says he will not rest until the killer of his daughter is found.

“I promise as long as I have breath in me, I can talk to people and make sure they’re not comfortable in there,” he said.