Investigators Link Kentucky Mansion Murder to Wife's Conspiracy

A missing California transplant was found shot to death inside a vacant property in Burkesville, Kentucky, in September 2022, prompting an investigation that uncovered an alleged murder conspiracy involving his estranged wife and another man. Michael "Mike" Harding, who lived in Tennessee, had been lured to the property under the pretense of an air-conditioning repair job, according to Kentucky State Police investigators.

David Hammersley and his family discovered Harding's body on September 26, 2022, while viewing a rural property featuring a main house, a detached garage and a cottage. The Florida residents were searching for a home after leaving an area affected by hurricanes, according to CBS News.

Hammersley initially suspected an animal had died inside the cottage after his family noticed a powerful odor. Instead, he found a man lying on the floor with apparent gunshot wounds and contacted authorities.

"I saw a man on the floor, his arm outstretched, obviously dead, from gunshot wounds," Hammersley told CBS News correspondent Peter Van Sant.

An autopsy determined that Harding had been shot four times, twice in the torso and twice in the head. Prosecutor Ann Marie Gordon Anderson estimated that his body had remained at the property for approximately a week before its discovery.

Kentucky State Police Detective BJ Burton led the investigation. Investigators found Harding's cellphone at the scene and examined its messages and call history to establish how he had arrived at the property.

"Once you start looking through the text messages and phone calls, it becomes very obvious early on that he was lured to the house," Burton told CBS News.

According to investigators, a person using the name James Fraser had contacted Harding to request an HVAC service call. Harding operated an HVAC business and appeared to believe he was responding to a legitimate work assignment. Investigators traced the contact number to a prepaid cellphone that they suspected was being used as a burner phone.

The investigation subsequently focused on Thomas O'Donnell, a former car salesman living in Napa, California. Investigators found that Harding's wife, Julie Harding, a California Highway Patrol captain, had made approximately 194 calls with O'Donnell in the months preceding her husband's death, according to CBS News.

Authorities also determined that the prepaid phone and O'Donnell's phone had been in the same location several weeks before the killing. Burton said investigators found that the prepaid device had first been activated in the Houston, Texas, area.

"I don't think Mr. O'Donnell got out here by accident. The only connection that he had to Michael Harding was through Julie Harding," Burton told CBS News.

Julie Harding and her husband were living separately during a contentious divorce, with Mike in Tennessee and Julie in California. Family members told investigators that Mike had feared his wife. His daughter, Heather Cavalieri, also described her reservations about Julie in an interview with CBS News.

"I feel like he was blinded by love. He truly loved her ... So, I thought he found his dream girl. But to me personally, I just, I didn't like her," Cavalieri told CBS News.

Investigators suspected that financial concerns surrounding the divorce may have motivated the alleged conspiracy. Burton believed Julie Harding feared losing hundreds of thousands of dollars in the proceedings, although that proposed motive was an investigative theory rather than an established fact.

On December 8, 2022, authorities arrested O'Donnell in connection with Harding's murder. Two days later, Julie Harding was found dead at the Tennessee residence where her husband had been living. An investigator determined that she had died by suicide.

O'Donnell pleaded not guilty to the murder charge. A Kentucky jury later found him guilty, and he was sentenced to life in prison with the possibility of parole after 20 years, according to CBS News.