PINELLAS COUNTY, Fla. \- Detectives assigned to the Robbery/Homicide Unit are investigating the death of 53-year-old inmate Kevin Kelley. Detectives say Kelley was booked into the Pinellas County Jail on May 31, 2024, after being arrested by the St. Petersburg Police Department for One Count of Driving Under the Influence, One Count of Possession of Marijuana, and One Count of Possession of Drug Paraphernalia. Read: Disgraced Former MMA Fighter Pleads Guilty To Brutal Stabbing Murder In New Jersey Detectives learned on June 1, 2024, Kelley was transported to a local hospital for medical reason…