A Lancaster man has been charged with the murder of 17-year-old Daquan Blackmon. Travis Belk, 25, was arrested Thursday night by the Chester County Sheriff’s Office. Blackmon was shot Aug. 18 just after 10 p.m. on East Arch Street in downtown Lancaster. He died Sunday. Belk was riding in a vehicle along with Blackmon during the shooting, according to a Lancaster Police Department release.