On April 21, 2018, at approximately 7:44 pm, an inmate at the Marion County Jail, Mathew Stephenson, age 40, of Yellville, became acutely ill. Upon assessment by the jailer, a call was immediately placed for First Responders and an ambulance.

Stephenson was transported to Baxter Regional Medical Center. Inmate Stephenson was non-responsive up and until the arrival at Baxter Regional Medical Center. He was pronounced dead at Baxter Regional Medical Center. His body has been sent to the Arkansas State Crime Lab to determine the cause of death and the matter is still under investigation.