I have watched NBC Nightly News for years - not sure why, it's just the U.S. network cast I chose and have stuck with all these years - but one of the correspondents I've always liked most is leaving the biz. Pete Williams has been the program's Legal Correspondent for almost 30 years. 

But as the linked article makes clear, he gets to cover one last huge story before it's his final "case dismissed." 

NBC News Veteran Pete Williams to Sign Off After Nearly Three Decades