Miramar Police detectives say they're close to solving a 37-year-old cold murder case of a former firefighter. Detective Danny Smith says William "Billy" Halpern, who was a bodybuilder at Apollo gym in Hollywood, was 28 years old when he was brutally killed in broad daylight in his Miramar townhome. Smith says they don't think he was connected to any criminal activity, but people at the gym were and he may have been killed to keep quiet about something he heard. Investigators have a DNA profile of a suspect and now want the public's help to get specific names and a match. Anyone with information leading to an arrest is eligible for a reward of up to 10-thosuand-dollars.