A 38-year-old transient is facing up to 40 years in prison after being convicted of two counts of sexual assault and one count of sexual exploitation of a child in a Cheyenne case.

That's according to a post on the Cheyenne Police Department's Facebook page.

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According to the post, Matthew Ruby "received 15 to 20 years in prison for each second-degree sexual assault charge, which will be served consecutively. He was also sentenced to 8 to 12 years for the sexual exploitation of a child charge, which will run concurrently with the other sentences. In total, he will serve 30 to 40 years in prison."

A Cheyenne School Resource Officer Started An Investigation In Late 2024

The case started with an investigation by a Cheyenne School Resource Officer in November of 2024 on allegations of a sexual assault. As the case unfolded, Cheyenne Police Detectives and staff at Safe Harbor in Cheyenne determined that Ruby had abused and assaulted a minor several times during 2024.

On May 22, 2025, he was arrested and booked into the Laramie County Jail on charges related to the assault.

The Tate Geological Museum Casper Wyoming

The Tate Geological Museum was founded in 1980 through a gift from Marion and Inez Tate. It was originally designated as the Tate Earth Science Center and Mineralogical Museum. Because ‘geological’ encompasses earth science, mineralogy, and paleontology, the name was changed to the Tate Geological Museum in 2001.

Located on the Casper College campus, the museum is a great resource for the community. Many local schools and groups come to the museum to add to their student's learning experience.

Tate houses a collection of over 6000 fossil and mineral specimens.

Gallery Credit: Glenn Woods