Police are still investigating the murder of a 21-year-old man over the weekend in Bridgeport.Jose Suarez, 21, was found Saturday morning at the Lakeview Cemetery on Boston Avenue. According to officials, he was shot once in the head.The murder is the fourth in five days in the city of Bridgeport. On Tuesday evening, two men were shot to death on the city's west side. Later that evening, an 18-year-old was stabbed to death less than a mile away. Anyone with information about the murder is asked to call Bridgeport police at 203-581-5201.