Investigators in Bergen County are asking the public to help find family members of a recently identified man who was struck and killed by a car on Route 17 in Hackensack more than 44 years ago. Eugene Mack Jr., who was 42 at the time of his death, was identified by the FBI through fingerprint analysis, according to medical examiner Zhongxue Hua and Bergen County Executive James Tedesco. Mack was struck by a vehicle on Route 17 in the city and taken to Hackensack University Medical Center, where he was pronounced dead on Feb. 22, 1978, according to Bergen County officials. When the county medi…