Tennessee Murder Trial Ends in Life Sentence for Conspirator in Plot Linked to Deceased CHP Captain

The quiet lake country along the Kentucky-Tennessee border became the backdrop for a grisly murder investigation in September 2022, when Mike Harding, a California transplant who had relocated to open an HVAC business, vanished without a trace. His disappearance triggered frantic phone calls from his wife, Julie Harding, a captain with the California Highway Patrol, who pressed law enforcement agencies for answers before arriving in person to demand information from local sheriffs.

Just days later, on September 26, 2022, a family house-hunting in Burkesville, Kentucky, made a gruesome discovery. David Hammersley wandered into the garage of a vacant property and noticed a pickup truck parked inside, which belonged to Mike Harding. Upon opening the door to an adjoining cottage, Hammersley was overwhelmed by an unbearable odor and swarms of flies. Inside, he found Mike Harding’s body on the floor with arms outstretched, having suffered four gunshot wounds—twice in the torso and twice in the head.

Investigators from the Cumberland County Sheriff’s Office and the Kentucky State Police determined Harding had been dead for about a week, killed between September 19 and September 26. The assassin had removed the murder weapon and three shell casings, but left behind a single distinctive Hornady Critical Defense bullet casing. Examining Mike Harding’s phone, detectives uncovered text messages from a man using the name James Fraser, who had lured the victim to the empty house under the guise of a heating and air service call. Investigators quickly realized James Fraser was a fabricated name attached to a burner phone purchased in Houston, Texas.

As investigators dug deeper into the couple’s personal lives, a picture of a deteriorating marriage emerged. Julie and Mike Harding had married in 2019 after meeting online, planning to retire together in a scenic lake house in Celina, Tennessee. Mike had moved there early to establish his business, but by 2022, tensions flared. Friends reported that Julie had begun drinking heavily and pulling away, while Mike suspected infidelity after discovering Amazon purchases of lingerie. The breaking point arrived when Julie announced she intended to postpone her retirement by five years, prompting her to file for divorce in May 2022.

Fearing for his safety following a break-in where one of his guns was stolen, Mike Harding wrapped steel chains and padlocks around his patio doors at night. Simultaneously, Julie told colleagues that she feared Mike was involved in dealing illegal ghost guns and narcotics and draining bank accounts. Authorities later found no evidence supporting those accusations. Tensions peaked when Julie drove from Sacramento to Tennessee and cleared out approximately $360,000 from the couple’s bank accounts.

Investigators focused their attention on Julie Harding’s communication logs, which revealed 194 phone calls between her and Thomas O’Donnell, a former Houston car salesman living in California’s wine country. The heavy communication abruptly stopped just days before the murder. Cellphone tower and locational data analyzed by the FBI showed O’Donnell’s personal phone and the burner phone used to lure Mike Harding traveled in lockstep through the South in the weeks leading up to the killing.

In early December 2022, investigators intercepted O’Donnell at the Sacramento International Airport. A search of his truck yielded one of Mike Harding’s stolen guns and a box of Hornady Critical Defense ammunition. Simultaneously, local deputies arrested Julie Harding for trespassing after she used a Ring doorbell camera to steal her late husband’s boxer, Charlie, from a friend caring for the animal. On December 9, 2022, the California Highway Patrol revoked Julie’s status as a peace officer, stripping her of her badge and gun.

The following morning, on December 10, 2022, a mail carrier discovered a body lying face down near a tree at the Celina property. Authorities identified the deceased as Julie Harding, who had died by suicide using a firearm. Investigators recovered a blood-stained note in a bag nearby addressed to her late husband, reading, “I lived a good life until a year ago. Mike, you win! You got what you wanted, me in a coffin…”

Nearly three years later, on April 27, 2026, Thomas O’Donnell went on trial for murder at the Cumberland County Justice Center in Burkesville, Kentucky. In a surprise shift, defense attorneys acknowledged that O’Donnell was present at the crime scene and helped lure Mike Harding to the house, but claimed he did not pull the trigger and that a second unknown man was the actual killer. Prosecutors countered with extensive locational data and phone records proving a conspiracy between O’Donnell and Julie Harding.

After five days of testimony and just two hours of deliberation, a jury unanimously found Thomas O’Donnell guilty of murder. He was subsequently sentenced to life in prison with the possibility of parole after 20 years.