A defendant pleaded not guilty to first-degree murder at an arraignment before DC Superior Court Judge Danya Dayson on June 5. Edgar Arrington, 38, is charged with first-degree premeditated murder while armed in a bias-related hate crime, possession of a firearm during a crime of violence, and unlawful possession of a firearm with a prior conviction greater than a year for his alleged involvement in the fatal shooting of 28-year-old Daquane John…