Mary McDonagh Murphy, the film and television producer whose documentary “Hey, Boo: Harper Lee and ‘To Kill a Mockingbird'” celebrates the 50th anniversary of that novel’s 1960 publication,  will visit UMaine on Tuesday April 12.  Murphy will participate in a screening of the film and a discussion during a session scheduled for 12:30-2 p.m. in read more Harper Lee Biographer at UMaine April 12