Journalist Fiona Barton keeps suspense going with ‘The Child’

As a journalist, Fiona Barton investigated crimes, attended trials and then wrote and filed her stories. But as the author of the just-released “The Child” and her best-selling novel, “The Widow,” both psychological thrillers, Barton had to switch gears. “It sounds ridiculous, but I had to stop being a reporter in order to write a…