When David Rathburn's daughter's started receiving odd text messages from their father, they knew something was off.

After retiring from his accounting career in July 2015, David moved to Las Vegas to start anew. Natasha McBride, David's daughter, told In Pursuit that David joined a motorcycle group, a hiking group, and a motorcycle club. He was really living his best life, she said.

On Oct. 1, 2017, 59 people were killed in a horrific attack at a concert in Las Vegas. David's children were worried about their father since he was always at events, and they reached out. But the women said the messages they received that day, and the many days that followed, did not sound like their dad.

One of the messages even read: "Can we talk later? I'm a little busy..." — which is definitely not like David. He was always accessible to his family, especially his children.

In the two weeks that followed, Natasha said her father refused to call on the phone, he would only text. At one point, he even revealed he had a new wife, which Natasha and her sister knew couldn't be true.

David was formally reported missing to authorities on Oct. 16, 2017. While Las Vegas Police conducted their investigation, David's family said they were doing some digging of their own. His children figured out David's house was sold, and he let it go for under market value. As an accountant, his kids knew he would never let this happen. His investments were things he worked his entire life for and he was always careful with his money.

When detectives said they called David's cell phone, a man claiming to be him answered and gave a bizarre response. David told the investigator he had cancer and was moving to Texas. He claimed he couldn't tell his family because he couldn't come to terms with dying.

Despite the cancer diagnosis, a new wife, his house being sold, and only answering via text message – it was a wire transfer from David’s account that broke this case wide open. The wire transfer led David’s family to a woman named Jolene Hibbs. David previously had mentioned he met a woman named “Jo” who was down on her luck and he was helping her out. She moved into his home and made herself quite comfortable. Although David’s intentions to help were pure, Hibbs’ heart was not.

Detectives said Hibbs moved her boyfriend, Charles Ausiello, into David’s house and the pair wouldn’t leave. David had plans to get them out, but Hibbs and Ausiello were allegedly hatching other ideas. Although David’s family never heard from him again, investigators from Las Vegas never gave up on the case.

By April 4, 2020, detectives said they were finally able to secure murder warrants for Hibbs and Ausiello.

Investigators said a source came forward and told them he knew where David’s body was placed, because he put him there. The source, according to authorities, claimed Hibbs asked him to discard the body after his murder. The source then drove 84 miles and dropped David in a mineshaft.

Natasha said, "To have to go to his funeral and know that it was because he was murdered, it was probably one of the hardest days of my life."

David's family is hoping for justice. Authorities said Hibbs and Ausiello may not be a couple anymore. They could be drug users and their appearances may have changed. Hibbs stands 5 feet 2 inches tall and Ausiello stands 5 feet 8 inches.

If you have any information on his whereabouts, please submit your tips to InPursuitTips.com or text 1-833-378-7783 (3-PURSUE).