A homicide suspect’s attorney rejected a plea deal from prosecutors and requested evidence withheld by the prosecution in his case on June 5 in DC Superior Court Judge Jason Park’s courtroom. Tyquan Jennings, 27, is charged with second-degree murder while armed, assault with a dangerous weapon, two counts of possession of a firearm during a crime of violence, and carrying a pistol without a license outside a home or business, for his alleged inv…