A defendant pleaded not guilty to first-degree murder at an arraignment before DC Superior Court Judge Jason Park on May 29. Kareem Thomas, 37, is charged with first-degree premeditated murder while armed and possession of a firearm during a crime of violence for his alleged involvement in the fatal shooting of 23-year-old Jakele Allen on Oct. 21, 2024 on the 800 block of Kentucky Avenue, SE. Allen died from a gunshot wound to his chest. The cou…