It’s been 30 years since the murder of David Robert Boyko in Dartmouth, and police are still begging the public for help solving it — saying that someone knows something. On May 12, 1996, police received a report of an injured man at the end of Morris Road in Burnside Industrial Park. Police said he was found by a pedestrian who had been walking in the area, adding Boyko had died from a gunshot wound. He was a resident of Manitoba at the time, a…