Deshaune K. Stewart is charged with aggravated murder for the pair of killings.

According to court documents, three witnesses said they saw Stewart, who was naked, shoot 52-year-old Lance Herrera-Dempsey in the Dublin post office shortly before 5 a.m. Herrera-Dempsey was Stewart’s direct supervisor, and Stewart was under investigation by the U.S Postal Service, police said.