It's the man who played a TV news reporter in Zodiac (2007) approximately 2 hours and 10 minutes (130 minutes) into the movie. It's during family dinner scene after Robert (Jake Gyllenhaal) and his son are excused from the table to watch the news. The reporter's name is Alan Freeman (sp?). I have no clue who he is! I'm pretty sure he's uncredited, but I know for sure he's been in other things.
Bill Seward played a news anchor in the film (uncredited) - is this who you think you saw?
Alternatively, Mitchell Fink is uncredited but plays a reporter in the film - ring any bells?