Air Force Capt. Frank Theer Murdered by Unidentified Gunman; Wife Michelle & Army SSG John Diamond Sentenced to Life in Prison (December 17, 2000)

Captain Frank Theer, U.S. Air Force

Captain Frank ‘Marty’ Theer, US Air Force, was murdered on December 17, 2000 in Fayetteville, North Carolina. Military and civilian prosecutors believe Marty was murdered by his wife Michelle Theer and her lover SSG John Diamond, a sniper in the US Army stationed at Fort Bragg. Michelle tried to claim that John was obsessed with her and killed Marty so he could be with her. John Diamond’s defense team claimed that Michelle killed Marty for his large life insurance policy and set John up to take the fall. Prosecutors theorized that Michelle Theer manipulated John Diamond into committing the murder by claiming that Marty abused her. John’s family believe that the Army railroaded John because he was an enlisted man accused of killing an officer. In the end they would both be convicted of the murder of Marty Theer and spend the rest of their life in prison.

“Michelle Theer was named as a conspirator by Army prosecutors, but they had no jurisdiction over her because she is a civilian. She has not been charged in civilian courts.” -FayObserver (5/19/2002)

Investigation Discovery:

In 2000, Michelle Theer was an Air Force wife in the military town of Fayetteville until a fatal shooting made her a widow. The investigation into her husband’s death led police to the door of an Army Ranger – taking orders from very unlikely accomplices. -Fayetteville, Sins and Secrets (S2,E3)

Sexy psychologist and doting Air Force wife Michelle begins a swinging affair with Army Sgt. Diamond while her husband, Captain Marty Theer, is away. But all’s fair in love and war, and Marty’s return will remind them that love is a battlefield. -Sergeant Swinger, Scorned: Love Kills (S4,E1)

Oxygen:

A frantic, distraught woman runs into a video rental store screaming that her husband has been shot. -Michelle Theer & John Diamond, Killer Couples

Killer Couples: S8 E5 Preview – Michelle Theer and John Diamond | Oxygen

Killer Couples: S8 E5 After the Verdict – Michelle Theer and John Diamond | Oxygen

Psychologist Debbie Layton-Tholl talks about her experience meeting with Michelle Theer. -Michelle Theer & John Diamond, Killer Couples

A lonely military wife and psychologist go searching for sex on the Internet with deadly results. -Michelle Theer & John Diamond, Killer Couples (S8,E5)

Editor’s note: With a cable subscription, you can download the free ID Go app and watch Investigation Discovery programming at your convenience. And for those who do not have cable, you can watch “unlocked” episodes on the ID Go app including the latest premieres. For those who prefer commercial free programming during your binge session, Prime Video has an ID channel: ‘True Crime Files by Investigation Discovery” available for $3.99 a month. It’s a compilation of older seasons but totally worth the cost if you are a true crime addict. Download the ID Go app or purchase ID True Crime Files & binge away.

1 thought on “Air Force Capt. Frank Theer Murdered by Unidentified Gunman; Wife Michelle & Army SSG John Diamond Sentenced to Life in Prison (December 17, 2000)”

majiir on September 1, 2019 at 4:36 am said:

This is showing on Oxygen Channel as I’m typing this. Michelle Theer could have divorced Marty Theer and walked away, but she chose not to, conspired with John Diamond to kill Marty, and went on the run to avoid being held accountable for committing this heinous, unnecessary murder. I’m glad law enforcement stay on the case, found her, prosecuted her, and that she was finally convicted for the role she played in her husband’s death. He kept trying to stay in the marriage by attending counseling sessions with her, but I wish he’d walked away. Staying cost him his life. I read Marty’s bio, and he seems to have been a nice guy from a loving family who just so happened to fall in love and marry the wrong person. How sad to lose one’s life at 31-years-of age.

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Air Force Capt. Frank Theer Murdered by Unidentified Gunman; Wife Michelle & Army SSG John Diamond Sentenced to Life in Prison (December 17, 2000)

1 thought on “Air Force Capt. Frank Theer Murdered by Unidentified Gunman; Wife Michelle & Army SSG John Diamond Sentenced to Life in Prison (December 17, 2000)”

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