Clockwise from top left: 'McNeal,' 'Oh, Mary!,' 'Sunset Blvd.,' 'Romeo + Juliet,' 'Gypsy' and 'Maybe Happy Ending' Matthew Murphy and Evan Zimmerman/Emilio Madrid ...

Detectives have made an extraordinary breakthrough in the unsolved murder of Kerryn Tate, identifying a suspect they believe may have been responsible for the 45-year-old crime amid fears she was the ...