Nancy Mae Probst

Status:

Open

Jurisdiction:

Midwest City Police Department (OK)

Offense Location:

Midwest City, Oklahoma

Summary:

Nancy Mae Probst, 32, was found murdered in her Midwest City, Oklahoma home on November 16, 2000. She was beaten, then shot in the back of the head with a .25-caliber gun. No one has been convicted of the crime, and the case remains unsolved.

Vital Statistics

Circumstances of Offense:

Nancy's husband Matthew arrived home from work to find a window broken. As he looked through the window, he saw his wife laying on the floor and heard their child crying. He didn't enter the home, instead returning to his vehicle and calling 911. It is believed that Nancy's murder happened in broad daylight in the middle of a neighborhood. Authorities found Nancy laying on the floor of her child's bedroom, with her nine month old daughter alive but distraught in the crib next to her. She was partially clothed and had been severely beaten and killed by a gunshot to the back of the head.

Additional Details:

After a series of statements that authorities found suspect, and finding out about a lengthy history of infidelities, Matthew Probst was arrested and charged with Nancy's murder in March 2001. Phone records show that Matthew called his wife 26 times between 3 and 6 p.m. on the day of the murder. According to a private investigator hired by the family, Nancy had a busted lip, her face was black and blue, had numerous contusions on her body and her hair had been pulled out, indicating a really violent struggle with a lot of rage in the killing. Authorities stated that the lack of burglary, forced entry, or sexual assault led them to believe that the scene they were called to had been staged by Matthew. In September 2002, charges against Matthew Probst were dropped, citing a lack of evidence. Investigators looked at Calvin Mosley, who had broken into nearby homes to sexually assault women; he was convicted of those crimes after Nancy's murder and remains in prison. However, police decided Mosley's method of operation didn't match up with how Nancy was killed. Byron Helmle, Nancy's brother, adopted Nancy's daughter. She has no contact with Matt Probst. Now 15, Lalia has lots of questions about her mother and the murder. Midwest City police say this is still an active case.

Case Last Updated:

Jun 15, 2026