Boston cops have issued a public plea for potential kidney donors in an effort to help former City Councilor John Nucci, the father of a Hub officer.“Last week, the Boston Police Department learned that the father of one our own, former city councilor John Nucci (father of BPD officer Mike Nucci), is suffering from Polycystic Kidney Disease and is in need of a kidney transplant,” the department wrote in a post on its news blog.