The Metropolitan Police Department (MPD) announced the arrest of 36-year-old Christopher Taylor on Oct. 15.
Taylor allegedly stabbed 31-year-old Michael Alanzo Jackson on April 10 on the 1600 block of V Street, SE.
Jackson was found unconscious with puncture wounds and later pronounced dead at a hospital.
Taylor, who was already incarcerated, has been charged with second-degree murder while armed.