If you’ve spent any time falling down a true crime rabbit hole, you’ve probably heard of the Amarillo plastic surgeon who traded silver for a hitman. It sounds like something out of a bad paperback thriller. But for those in West Texas, the Dr. Thomas Dixon Dateline case wasn't fiction. It was a brutal reality that left a respected pathologist dead and a medical community in total shock.
Honestly, the details are still hard to wrap your head around even years later.
A Love Triangle Gone Deadly
At the center of it all was Richelle Shetina. She was a woman caught between two successful men: Dr. Thomas Dixon, the wealthy plastic surgeon she had been dating, and Dr. Joseph Sonnier, a pathologist from Lubbock she began seeing after things with Dixon soured.
Dixon didn't take the breakup well. That’s an understatement.
Instead of moving on, prosecutors say Dixon became obsessed. He didn’t just want her back; he wanted Sonnier out of the picture. But he didn't want to get his own hands dirty. Enter David Shepard, Dixon’s business partner and supposed "best friend."
The price for the life of Dr. Joseph Sonnier? Three bars of silver worth about $9,000 and a box of expensive cigars.
The Night in Lubbock
On July 10, 2012, David Shepard broke into Sonnier’s beautiful home through a back window. He didn't just kill him; he executed him. Sonnier was shot five times and stabbed eleven times. It was a frenzied, personal attack.
Police were stumped at first. Why would anyone want to kill a man who spent his days looking at slides under a microscope?
The break in the case didn't come from a high-tech lab. It came from a roommate. Paul Reynolds, who was living with Shepard at the time, called the Lubbock Crime Line. He told police his roommate had been talking about killing someone in Lubbock for a doctor friend.
That was the thread that unraveled everything.
What the Dr. Thomas Dixon Dateline Episode Missed
When Dateline covered this, people were glued to their screens. But the legal battle that followed the cameras leaving was almost as messy as the crime itself.
Dixon has actually been through the wringer legally:
- First Trial: Ended in a hung jury. One or two people just weren't convinced Dixon intended for Shepard to kill Sonnier, rather than just "handle" the situation.
- Second Trial: Conviction. Dixon was found guilty of capital murder and sentenced to life without parole.
- The Appeals: This is where it gets wild. For a while, it looked like Dixon might actually walk. In 2018, his conviction was overturned because of how the police tracked his cell phone data. He was even released on a $2 million bond.
Can you imagine? A convicted man back on the streets because of a technicality about cell tower pings.
But the Texas Court of Criminal Appeals wasn't having it. They eventually reinstated the conviction, ruling that even without the cell data, there was a mountain of other evidence against him. We're talking about the silver bars, the cigars, and the fact that the murder weapon actually belonged to Dixon himself.
The Lingering Questions
Is Dr. Thomas Dixon still in prison? Yes. As of early 2026, he remains behind bars, though his legal team continues to file writs and challenge every possible error from the 140th District Court.
What most people get wrong about this case is the "surveillance" defense. Dixon’s lawyers argued he only paid Shepard to spy on Sonnier. They claimed Dixon wanted photos of Sonnier cheating so he could "save" Richelle from him. Basically, a "stalking gone wrong" defense.
The jury didn't buy it. You don't give your best friend your gun and three silver bars just for some grainy photos of a guy at a restaurant.
Actionable Insights for True Crime Followers
If you’re following the Dr. Thomas Dixon Dateline story or similar murder-for-hire cases, here is how to stay updated on the actual legal movements:
- Check the Texas 7th Court of Appeals: This is where the local filings happen for the Amarillo and Lubbock area. You can search by case number or name to see if new writs have been filed.
- Monitor Civil Litigation: As of 2025 and into 2026, Dr. Sonnier’s sons have been pursuing a civil lawsuit for over $1 million. Civil trials often reveal evidence that didn't make it into the criminal proceedings.
- Read the Justia Law summaries: If you want the "real" facts without the TV drama, reading the memorandum opinions from the appeals court gives you the exact text messages and testimony that led to the conviction.
The story of the plastic surgeon, the pathologist, and the silver bars remains one of the most chilling examples of how obsession can turn a healer into a monster. It’s a reminder that sometimes, the most dangerous people aren't the ones in the shadows, but the ones sitting across from you at a dinner party.
To get the full picture of the case's current status, you should review the most recent filings in the Lubbock County District Clerk's records, specifically regarding the ongoing civil litigation brought by the Sonnier family.