Overview

• Jurors delivered the death sentence on Sept. 22, 2025, after finding the 28-year-old guilty of killing Marissa Grimes in 2022.
• Investigators discovered Grimes’ body wrapped in blankets and a tarp in the crawl space under O’Steen’s rental house, with prosecutors saying he lived above her remains for 10 days.
• O’Steen had been arrested in January 2022 for abusing Grimes, was fitted with a GPS ankle monitor, and was under an emergency protective order barring contact.
• Court documents say a neighbor saw O’Steen threaten Grimes with a gun on Feb. 12, 2022; days later police found her abandoned U-Haul, then located her body during a search of his home.
• The medical examiner ruled the death a homicide caused by blunt-force trauma to the head, and prosecutors detailed extensive injuries consistent with a prolonged beating.