10/11/2026
Last night we stepped into one of Missouri’s most historically significant (and heavy) locations: the Old Cooper County Jail in Boonville. 
Built in 1848 this was the longest continuously operating county jail in the state, remaining in use until a federal court closed it in 1978 for cruel and unusual punishment. Enslaved laborers quarried the 2½-foot-thick limestone blocks (some hand-carried from the Missouri River area) and built the original two-story structure. Early prisoners were shackled by the feet to iron rings bolted into the walls of large “bullpen” rooms; the ground-floor bullpen also held enslaved people awaiting sale on Main Street. 
In 1871, iron box cells (shipped by steamboat from St. Louis) were installed by the inmates themselves. An adjoining sheriff’s residence was added around the same time, and in 1878 the hanging barn/stable was built to house the sheriff’s horses for posses. That barn is the site of Missouri’s last public hanging: on January 31, 1930, Lawrence Mabry (age 19 at ex*****on, 17 at the time of the crime) was hanged for a murder during an attempted robbery. He had spent roughly two years in the isolated death-row cell upstairs. The barn was destroyed in 2023 by a tree that fell on it during a storm.
The jail’s most famous prisoner was Frank James (Jesse’s brother). On April 24, 1884, Sheriff John Rogers brought him in on a warrant connected to an 1876 train robbery. Sympathetic Boonville residents raised his bond within hours, and the case was later dismissed for lack of evidence. It’s said he never stayed at the jail, he had a hotel room at the Frederick, down the street. 
The cells are empty now, but the thick stone walls, peeling paint, and iron bars still carry the weight of everything that happened inside them, from the bullpen days through the final decades of operation with no heat, no air conditioning, and no working lights in the cells. Standing in those spaces (and sitting outside where the hanging barn stood, makes the history feel very immediate.
A huge thank you to Katy Trail Paranormal for hosting this investigation. It’s always an honor to be welcomed into historic sites like this by teams who care about both the research and the stories. We appreciate the opportunity and the hospitality. 
History and the residual energy of places like the Old Cooper County Jail are why we do this work. Every cell has its own story. Sometimes you hear the keys, the chains, or a name that doesn’t belong to anyone living. We were listening.
